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Table of Contents show Types of RV Batteries Starter Batteries Deep Cycle Batteries Locations for RV Batteries How to Tell […]","datePublished":"2021-08-17","dateModified":"2024-01-05","author":{"@type":"Person","@id":"https:\/\/livingpioneer.com\/author\/pete\/#Person","name":"Pete","url":"https:\/\/livingpioneer.com\/author\/pete\/","identifier":2,"image":{"@type":"ImageObject","@id":"https:\/\/livingpioneer.com\/wp-content\/litespeed\/avatar\/30c83c48d82c080140bb064c7762d28a.jpg?ver=1779254525","url":"https:\/\/livingpioneer.com\/wp-content\/litespeed\/avatar\/30c83c48d82c080140bb064c7762d28a.jpg?ver=1779254525","height":96,"width":96}},"publisher":{"@type":"Organization","name":"Living Pioneer","logo":{"@type":"ImageObject","@id":"https:\/\/livingpioneer.com\/wp-content\/uploads\/2020\/03\/living-pioneer-icon-logo-50x50-1.png","url":"https:\/\/livingpioneer.com\/wp-content\/uploads\/2020\/03\/living-pioneer-icon-logo-50x50-1.png","width":50,"height":50}},"image":{"@type":"ImageObject","@id":"https:\/\/livingpioneer.com\/wp-content\/uploads\/2021\/08\/car-battery-296788_1280-600x400r.jpg","url":"https:\/\/livingpioneer.com\/wp-content\/uploads\/2021\/08\/car-battery-296788_1280-600x400r.jpg","height":400,"width":600},"url":"https:\/\/livingpioneer.com\/how-to-tell-if-a-deep-cycle-battery-is-bad\/","video":[{"@context":"http:\/\/schema.org\/","@type":"VideoObject","@id":"https:\/\/www.youtube.com\/watch?v=5Lzo8VNBoSI#VideoObject","contentUrl":"https:\/\/www.youtube.com\/watch?v=5Lzo8VNBoSI","name":"Weize 35 AH AGM deep cycle battery load test. Solar\/troll motor battery.","description":"Links:\n\nhttps:\/\/amzn.to\/42GOBZn\n\nhttps:\/\/amzn.to\/42IZtG5\n\nCharge-Discharge Monitor, DROK... https:\/\/www.amazon.com\/dp\/B07YWVCBRN?ref=ppx_pop_mob_ap_share\n\nHave confidence in these batteries. They perform well for the cost. However, customer service\/warranty is another factor for weighing your options. If you\u2019re on a budget build, have confidence. I\u2019ve had five of these and plan on doing a follow up review down the road. I will try to make a vid of a load test on the 100ah models. \n\nThanks for watching!","thumbnailUrl":["https:\/\/i.ytimg.com\/vi\/5Lzo8VNBoSI\/default.jpg","https:\/\/i.ytimg.com\/vi\/5Lzo8VNBoSI\/mqdefault.jpg","https:\/\/i.ytimg.com\/vi\/5Lzo8VNBoSI\/hqdefault.jpg","https:\/\/i.ytimg.com\/vi\/5Lzo8VNBoSI\/sddefault.jpg","https:\/\/i.ytimg.com\/vi\/5Lzo8VNBoSI\/maxresdefault.jpg"],"uploadDate":"2021-04-10T02:09:39+00:00","duration":"PT9M30S","embedUrl":"https:\/\/www.youtube.com\/embed\/5Lzo8VNBoSI","publisher":{"@type":"Organization","@id":"https:\/\/www.youtube.com\/channel\/UCwnBp-Rac-EBbGxS4D7qzuA#Organization","url":"https:\/\/www.youtube.com\/channel\/UCwnBp-Rac-EBbGxS4D7qzuA","name":"DIGGING DEEP","description":"Hello, I enjoy making videos a little bit about everything and as the name goes, I\u2019m always digging into something. 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Our goal is to inspire people to get out and explore this amazing world of ours and educate people on how to do that responsibly. We do a lot of trip videos, gear reviews and a few how-to videos here and there. I drive a 2021 Jeep Gladiator Rubicon and my wife drives a 2021 Jeep Wrangler Rubicon. Though we love our Jeeps, for us, it's not about the vehicle. It's about the journey and the friendships we have made along the way. We spend a lot of time in the Ozark National Forest in Arkansas but also spend as much time as we can traveling other states seeing as much of this amazing country as we can.\n\nPlease subscribe, like, and comment. We appreciate all of the support!\n\n\n","logo":{"url":"https:\/\/yt3.ggpht.com\/ytc\/AIdro_kom8_079pX73bbNlttT44pLmOKMaZ9mc6bM6wtNsJDCQ=s800-c-k-c0x00ffffff-no-rj","width":800,"height":800,"@type":"ImageObject","@id":"https:\/\/www.youtube.com\/watch?v=DjKg9hgYGmk#VideoObject_publisher_logo_ImageObject"}},"potentialAction":{"@type":"SeekToAction","@id":"https:\/\/www.youtube.com\/watch?v=DjKg9hgYGmk#VideoObject_potentialAction","target":"https:\/\/www.youtube.com\/watch?v=DjKg9hgYGmk&t={seek_to_second_number}","startOffset-input":"required name=seek_to_second_number"},"interactionStatistic":[[{"@type":"InteractionCounter","@id":"https:\/\/www.youtube.com\/watch?v=DjKg9hgYGmk#VideoObject_interactionStatistic_WatchAction","interactionType":{"@type":"WatchAction"},"userInteractionCount":11009}],{"@type":"InteractionCounter","@id":"https:\/\/www.youtube.com\/watch?v=DjKg9hgYGmk#VideoObject_interactionStatistic_LikeAction","interactionType":{"@type":"LikeAction"},"userInteractionCount":431}]}],"about":["Boating","Off Grid","RVs","Van Life"],"wordCount":2561,"articleBody":"RV batteries typically last for several years.In this article, we briefly cover the types of RV batteries available and where they\u2019re located. Then the remainder of it goes into depth about the testing procedures.            Table of Contents                                    show                                                Types of RV Batteries                            Starter Batteries                            Deep Cycle Batteries                            Locations for RV Batteries                            How to Tell If a Deep Cycle Battery is Bad                            Protect Yourself When Working with Batteries                            Performing a Pre-check on Deep Cycle Batteries                            How to Test a Deep Cycle Battery                            Testing the Battery\u2019s Voltage                            What Should a 12 volt Battery Read When Fully Charged?                            Low Voltage Readings                            Can a Deep Cycle Battery Be Load Tested?                            How to Load Test a Deep Cycle Battery                            Sulfated Battery Symptoms                            How Often Do Deep Cycle Batteries Need Replacing?                            Closing Thoughts                            Related Articles        Types of RV BatteriesThere are two types of RV batteries:Starter batteriesDeep cycle batteriesStarter BatteriesStarter batteries are designed to provide a high surge of power to get the engine started.They\u2019re common in RVs, automobiles, and boats too.There are hybrid batteries with both starter and deep-cycle functionality, the hybrid type is far more common in boating than in RVing.The starter battery typically will perform a certain number of engine starts before the battery is low and needs to be recharged.Deep Cycle BatteriesDeep cycle batteries are different from starter batteries. This is because they perform different functions.Instead of a strong burst of cold cranking amps to get an engine started, 12-volt deep cycle batteries are designed to reliably provide a steady flow of electricity.It\u2019s exactly what\u2019s required in an RV to power your lights, refrigerator, and heating without the battery presenting regular power problems.There are different types of deep cycle batteries: AGM, lead-acid, gel, lithium, etc. However, a detailed explanation of each type is beyond the scope of this article.However, we do touch on these types as they become relevant within this article.An example of a popular lead-acid deep cycle RV battery is below:https:\/\/www.youtube.com\/watch?v=5Lzo8VNBoSIVideo can\u2019t be loaded because JavaScript is disabled: Weize 35 AH AGM deep cycle battery load test. Solar\/troll motor battery. (https:\/\/www.youtube.com\/watch?v=5Lzo8VNBoSI)Weize 12V 35AH Battery Rechargeable. SLA Deep Cycle AGM to Replace 12 Volt 30AH\/33AH\/34AH\/36AH (In Series 24V 36V 48V)Check at  Amazon\u24d8 If you click this link and make a purchase, we earn a commission at no additional cost to you.One commonality to all but the lithium type is that they should only be depleted down to between 40-60% to avoid damaging the battery\u2019s cells.Each manufacturer and product information differs on this, so check your battery\u2019s manual or specifications to know the minimum safe charge level for certain. Therefore, while a battery\u2019s capacity might be 110Ah, it\u2019s probably only safe to use roughly 50-55Ah of its full capacity from a fully charged state.With the lithium battery type, it may tolerate being depleted down to 20% or less. It\u2019s one of the advantages of lithium, however, they\u2019re vastly more expensive and need to be replaced as a pack.The majority of RV owners won\u2019t have lithium installed for their house batteries unless originally installed at the factory or a previous owner swapped over to them. In both cases, that\u2019s rare.The best lithium battery for an RV is the Renogy LiFoPO4 Deep Cycle 12V 100Ah battery. There is an optional monitoring screen, which is handy for RVers too:https:\/\/www.youtube.com\/watch?v=x4sWV0FgySwVideo can\u2019t be loaded because JavaScript is disabled: Renogy 100ah 12v LiFePo4 Self-Heating Battery Review (https:\/\/www.youtube.com\/watch?v=x4sWV0FgySw)Renogy 12V 100Ah LiFePO4 Deep Cycle Lithium Battery. 4,000+ Cycles. Built-in BMS. Maintenance-FreeCheck at Amazon\u24d8 If you click this link and make a purchase, we earn a commission at no additional cost to you.Read Also: How To Remove Sticker Residue from CamperLocations for RV BatteriesThe starter battery will be located up front as you might expect.The house batteries (sometimes referred to as coach batteries) are 12-volt ones typically situated somewhere in the main coach area.Under the dinette seating is standard. But you may need to check in the RV\u2019s manual or hunt around to locate them if you\u2019re unsure.Read Also: Fastest Way to Charge RV Batteries?How to Tell If a Deep Cycle Battery is BadThere is a procedure to follow for how to test a deep cycle battery.While deep cycle batteries are usually 12-volt ones, this isn\u2019t a steady voltage, and the number is rounded down.The voltage will begin a little higher (12.7 V) confirming a 100 percent charge. Then as the battery is drained of its stored power, the voltage will noticeably decline.At a 50% level, the voltage reading should show around 12.2 volts, and with a 20% remaining charge, it will read approximately 11.98 volts.To perform the procedure, two or 3 of these tools are useful:Battery Load testerHydrometer ORDC Voltage meter(Affiliate links above.)https:\/\/www.youtube.com\/watch?v=2SW6BzgNvfEVideo can\u2019t be loaded because JavaScript is disabled: Introduction to the AstroAI 6000 Digital Multimeter (https:\/\/www.youtube.com\/watch?v=2SW6BzgNvfE)AstroAI Digital Multimeter TRMS 6000 Counts Volt MeterCheck at Amazon\u24d8 If you click this link and make a purchase, we earn a commission at no additional cost to you.We will cover each of these through our explanation of how to test your batteries. No more wondering how to tell if your RV battery is bad or not. That\u2019s peace of mind, at least. https:\/\/www.youtube.com\/watch?v=m58CWPAxES8Video can\u2019t be loaded because JavaScript is disabled: Best battery load tester | ANCEL BST200 Battery Load Tester 12V 100-1100 CCA Automotive Bad Cell (https:\/\/www.youtube.com\/watch?v=m58CWPAxES8)Ancel BST200 Car Battery Tester (12V 100-1100 CCA)Check at Amazon\u24d8 If you click this link and make a purchase, we earn a commission at no additional cost to you.Read Also: Charging Trailer Battery from Tow VehicleProtect Yourself When Working with BatteriesWear thick gloves and eye goggles to protect yourself when working with batteries.Depending on the battery type, they can contain acid or other substances that can spill out.Therefore, wearing protective gear is important. Also, if you have kids, then have them play elsewhere for safety reasons.Read Also: How to Charge RV Battery with GeneratorPerforming a Pre-check on Deep Cycle BatteriesTo get more accurate test results, a full charge is best.When the battery cannot be charged, rest it for 1-2 hours before returning to it.The rest period will help to get better battery readings using the above-mentioned tools because deep-cycle batteries need time to settle.A visual pre-check is useful with batteries to look for irregular things that could indicate a problem.Here are a few of the major things to visually look for in a pre-check:Malformed battery case \u2013 When a battery case has a bulge or is otherwise not in the same regular shape it usually would be, that suggests it is damaged. It would need to be replaced and not charged again. The battery is now a safety risk. It must be removed and replaced.Leaking \u2013 Even minor leakage from the battery is a worry. Major leaking means the battery should be written off completely. While a battery can leak occasionally, it\u2019s a bad sign and we\u2019d want to replace that battery if we observed this during a check.Terminal broke or damaged \u2013 The terminals that provide the connection to hook onto the need to be in good condition. When one or more is noticeably damaged or broken off, that battery is done. Replace it immediately and never use it again.Plastic casing damaged \u2013 The battery\u2019s casing could be cracked or broken in some way. This indicates either that the battery was previously bulging out and forced it to crack, or it was damaged during transit. Either way, the battery should be replaced because its safety for use is uncertain. Do not risk the use of a damaged battery.Changing color \u2013 A change in the observable color of the battery or the case is a no-no. It suggests something is wrong inside, possible internal leakage, or worse. The battery again needs to be scrapped and not used.If you see any of the above observables, remove, dispose of, and replace the affected battery. When doing so, it\u2019s best to replace it with a matching battery of the same make, and model.Damaged batteries pose a major safety risk. Do not risk continuing to use them for any duration.Read Also: How Long Will A 12 Volt Battery Run a Refrigerator?How to Test a Deep Cycle BatteryTesting the Battery\u2019s Voltagehttps:\/\/youtu.be\/-JFUad9ECWIVideo can\u2019t be loaded because JavaScript is disabled: RV Tips \u2013 How to check your battery and charging system (https:\/\/youtu.be\/-JFUad9ECWI)Following a detailed look over your battery bank, and you\u2019ve satisfied yourself that they look okay, then check the voltage reading for each coach battery. This is the best starting point for how to test an RV battery. Other steps continue later in this article. As a side note for boat owners, a deep cycle marine battery not holding a charge can be tested similarly. The DC voltage readings during a deep cycle battery voltage test will confirm whether there\u2019s a problem with one or more battery cells.It\u2019s useful to wait several hours before testing the voltage once the RV batteries are fully charged. It allows the batteries to settle for more accurate readings.Use either a multimeter or possibly a voltmeter, to test each deep cycle battery. Verify the voltage reading to confirm the charged state.   Please refer to the table below for approximate voltage readings and charge percentages: \tVOLTAGE:CHARGE (%):\t11.98 V20\t12.04 V30\t12.12 V40\t12.20 V50\t12.28 V60\t12.36 V70\t12.46 V80\t12.64 V90\t12.70 V100Typically, the voltage readings will be between 12.2 volts (roughly a 50% charge level) and 12.7 volts (approximately 100% charge level).What Should a 12 volt Battery Read When Fully Charged?Approximately 12.7 volts will convey a 100% charge level.Low Voltage ReadingsIf the deep cycle battery won\u2019t fully charge, then it\u2019s useful to perform some tests on it.If the problem is a deep cycle marine battery not charging, check the connection to it. Otherwise, it is necessary to load test it. The deep cycle battery may have become damaged due to excessive charge draining.A multimeter or voltmeter can be used. They may confirm a reading at 11 volts or lower.A valid volt reading below 11 volts suggests that the battery is now a dud and must be replaced.A zero-volt reading would mean that something has short-circuited. That requires a more detailed review to discover why.Can a Deep Cycle Battery Be Load Tested?Yes, it can. Load testing is intended to confirm how well a deep cycle battery holds its charge.When it\u2019s struggling to do so or it discharges quickly, then it\u2019s likely that either the battery is faulty, it\u2019s sulfated (more on this in the next section), or the internal cells are damaged due to incorrect charging methods.How to Load Test a Deep Cycle BatteryIf you\u2019re planning to do it yourself, battery load testing equipment is required to load test a battery properly. Here is how to perform the deep cycle load test:Disconnect all the cables attached to the battery terminalsConnect the battery load tester to the battery terminalsCommand it to provide a short load calibrated to half the Cold Cranking Amps (CCA) rating that the battery has.Once finished, the load tester will confirm the readings.You can expect a battery to retain over 9 volts and possibly below 11 volts for half a minute. This should remain until it\u2019s used up.However, when the charge goes into the battery during the test and then dissipates only seconds later, this confirms that the RV battery needs to be replaced.Sulfated Battery SymptomsBatteries suffer when they\u2019re only charged up partially rather than always receiving a complete charging cycle.Partially recharging a deep cycle battery can create sulfation. This is where sulfate crystals are formed and remain inside the battery.When not charged repeatedly for periods, the negative plates on the battery develop a sulfate build-up.Later, you\u2019ll notice a reduced performance as the charging ability suffers accordingly.There are some ways to attempt to partially recover sulfated batteries. However, for the most part, it\u2019s best to just replace them.How Often Do Deep Cycle Batteries Need Replacing?For RV owners who have purchased their motorhome or towable from a previous owner, it\u2019s not uncommon that they\u2019ve incorrectly charged the battery or repeatedly only partly charged it. Because of this, they may discover too late that the coach\u2019s battery pack is done for.It\u2019s such a frequent problem, that adding the cost of replacing the entire battery pack with a new set of batteries is sensible for most purchasers of second-hand RVs.For new battery purchases, their expected lifespan, or the number of recharging cycles (whichever comes first) varies with brand, model, and type.With that said, new batteries should last for several years, at least. We\u2019d suggest closely following the guidance from the battery manufacturer to get the most out of them.A few hundred recharging cycles are common with deep-cycle batteries. Lithium is the standout that usually runs into thousands of recharging cycles.Nevertheless, batteries that are treated poorly from a recharging and discharging standpoint are prone to failure regardless of the potential for a greater number of cycles. Hence, a battery\u2019s life cycle often depends on how its owner treats them.The best RV battery for dry camping is lithium. This is because it can be heavily discharged when there\u2019s little solar to boost its charge level.When boondocking on an overcast day and not wanting to drive around wasting gasoline to recharge the batteries via the alternator, lithium is invaluable. https:\/\/www.youtube.com\/watch?v=DjKg9hgYGmkVideo can\u2019t be loaded because JavaScript is disabled: Battery Swap \u2013 AGM VS Lithium \u2013 Renogy LifePo4 100ah Self Heating Batteries (https:\/\/www.youtube.com\/watch?v=DjKg9hgYGmk)Renogy 12V 100Ah LiFePO4 Deep Cycle Lithium Battery. 4,000+ Cycles. Built-in BMS. Maintenance-FreeCheck at Amazon\u24d8 If you click this link and make a purchase, we earn a commission at no additional cost to you.Closing ThoughtsWhen using the right equipment, it\u2019s possible to tell if the RV battery is bad. Deep cycle RV batteries go bad more often, but lithium ones aren\u2019t a special case.They\u2019ll tolerate more rough treatment with charging and discharging cycles, but they\u2019re not invulnerable to being badly managed by the RV owner and damaged as a result of it.Related ArticlesCharging Trailer Battery from Tow VehicleFastest Way to Charge RV Batteries?How to Charge RV Battery with GeneratorHow Long Will A 12 Volt Battery Run a Refrigerator?Should I Leave My RV Plugged in all Winter?How To Remove Sticker Residue from Camper"},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"How to Tell If a Deep Cycle Battery is Bad","item":"https:\/\/livingpioneer.com\/how-to-tell-if-a-deep-cycle-battery-is-bad\/#breadcrumbitem"}]}]