How to Wake a Sleeping LiFePO4 Battery 🔋 Charge a Fully Depleted Lithium Iron Phosphate Battery

🔋 How to Reactivate a Completely Dead Lithium Iron Phosphate Battery | Troubleshooting Guide 🔋

Are you having trouble with your lithium iron phosphate battery? A common call our support techs get is about activating sleeping LiFePO4 batteries that won't take a charge. In this video, we'll address this issue that some customers run into when they receive their batteries, install them, and mistakenly treat them like lead acid batteries. We'll guide you through the process of reactivating a completely dead battery and explain why it's not the battery's fault, but rather a charger-related problem.

The problem is some chargers and inverters, like the AIMS 75A charger, won't turn on until they see voltage on their input terminals. However, the battery won't wake up to provide power out until it receives a charge. It's a catch 22 when you have a deeply discharged battery! Learn how you can fix the issue in this video!

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🔌Chargers that WON'T have this issue:

[SaltAndCopper]

I was following advice to condition a new LiFePO4 battery by charging it to 100% and then discharging it completely. My heart stopped for a moment when my charger wouldn't do anything, and my multimeter showed it barely had voltage. I knew the BMS was doing its job and cutting off the cells at low voltage, but this video reminded me of an old reviving trick. I never would have thought of this trick as an easy way to fool a charger and get things going again.

[oldman]

FANTASTIC! I just woke up a 48v charger (and the battery pack) for my RV by putting 42v across the terminals using a Segway scooter charger. The battery read 32v - dead. Wonderful! Thanks a bunch! Even the battery manufacturer doesn't know this trick.

[timmyinthewell]

Thats why i didnt buy that particular AIMS power supply for my 24v batteries and went with a couple of victrons instead. I was afraid I might get into in some kind of emergency situation and not be able to charge a dead battery. Thankfully guys like you and Will Prowse are around to save people headaches. :) Liked and subscribed.

[timbookedtwo]

This method (with 12.8v battery as the "pusher") worked for me. My 7.2Ah Miady LifePO4 battery was drained to practically zero volts (0.08v). Thanks for the tip! If you are out in the field or have no other voltage source than a solar panel, you can - briefly - hook up the solar panel directly to the "dead" battery to jump start the BMS. I tried it too. It works. Nothing got fried.

[flecktards]

Hi. My battery died last night after more than a week of nothing but rain and this helped me out. Thanks man. I used a drill battery to jumpstart everything lol.

[getaway_man]

Very helpful, thank you! Now if SOK and these other companies could include this info when they package the batteries 😒

[billwilson]

This was the video that I needed! I was unable to get my Victron Inverter Charger back online after a winter of having my LiFePo4 batteries disconnected. Once I woke up my batteries and put a charge on them my inverter came back on,

[JasonSowder]

Excellent video no front end PC and lead up just straight to the point wish more videos were just like this

[ZLRob]

Go figure. I have an entire garage full of tools I have acquired over the last ten years but the one thing I don't have is jumper cables, but what I do have which works just as good is a Power Probe. Hooked it up to a secondary battery. Applied current for about 2 minutes, just enough time to power up the BMS and now the charger is taking over for the lithium battery on my Camaro. I had a feeling mine got fully drained by an accidental parasitic draw I had going over an entire day, just wasnt sure how to go about re- activating the BMS. Excellent video and thank you for the info!

[chriskoran]

Great information to know. The two batteries you sent me arrived already turned on so I never had to experience the issue. And if it would’ve happened to me in the field I would’ve been stumped.

[stevehogan]

Thanks, straight out info... no frills.... understandable for novice. Thank you. Subbed and liked.

[apal]

Your video is so helpful. I thought I fried my Lifepo4 battery but after watching your tips I was able to save my battery. Thanks a lot!!

[cipmike]

I fix friends dewalt batteries this way. Its the same exact problem, charger wont see it. Easyspeazy. Great video!

[jdeadman]

The Key is the BMS has cutoff the discharge of the battery. It will not reactivate until some current goes back into the battery. It's not the cells themselves but the BMS.

[hmasters]

To help those without jumpers or extra battery. You can actually use a standard 9v household battery to wake it up. Just connect your battery tender or charger then use a 9v to wake it up.

[dougfarrand]

Great explanation and demonstration. I am dealing with same situation where one of my two Renogy 100Ah 12V Smart Lithium batteries won't wake up.

[explorationsrenovations]

You certainly did make me have a better day!!! Thank you so much for this wonderful information. I'm surprised AmpereTime, SOK and WFCO do not readily publish this information. This is basic NEED TO KNOW that every LiFePo4 battery owner needs. Again - thank you so much for saving my hunting trip!

[peterlaws]

I had "dead" lithium batteries in the caravan put the charger on nothing happened nothing I did would work, watched your vid decided to connect the car running and Anderson plug whammo everything started to light up and the charger started to do its job, thanks heaps

[midwesthoodvents]

Thanks buddy! Just saved my water lines from freezing!

[robjohn]

I had this very same issue with my 60ah Tracker LIPO, took it back to BassPro and they explained the same thing you have here. Good video!