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    Looking for someone to repair a ebike battery

    -- repost into a more viewed category. Hi Everybody, been part of this community for a while and my day Job is at a small electric bike manufacturer in Germany. We have customers worldwide and sometimes stuff can go wrong... I have a customer whos ebike battery failed after 6 years, In...
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    Looking for someone to repair a ebike battery

    Hi Everybody, been part of this community for a while and my day Job is at a small electric bike manufacturer in Germany. We have customers worldwide and sometimes stuff can go wrong... I have a customer whos ebike battery failed after 6 years, In Australia, I believe Sydney, and we have no...
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    (GER) FREE 40x 18650 Self discharging but good capacity

    Greetings, Ive got 40x Sony VC7 cells from an ebike pack which was drained by a faulty BMS. The cells were sitting at close to 0V, clearly for a while. Managed to charge them back up carefully at 25mA and have cycled them 4x since. They are coming out at approx 3000mAh on the OPUS at 1A. They...
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    18650s in Germany for sale

    Greetings, Selling my extra,good,18650s for all those who need cells in Germany. Impossible to sell internationally as DHL finds absolutely every battery you send by air and its all illegal. Dischargetest with OPUS BT-C3100at 1A. Brands are varied as always, Samsung, Panasonic, Sony, LG...
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    E-bike packs assembled

    Greetings, Ive got some ebike packs that i have not yet broken down. They had/ havebroken Bmss. Selling them here for those that might need a all ready assembled packs for some project or even as spares / as replacements, if no one wants them ill take them apart of course but im thinking these...
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    HUUUGE USB POWERBANK

    Greetings, I set out to build a powerbank for camping / Festivals etc and finished it last week. I used the best cells I had to date that were similar, all from ebike batteries. Altogether I used 160 cells in a 4s40p config. It was 80x LG MG1's, 40x Panasonic NCR18650PF and 40x Panasonic...
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    Cant connect to Watchmon 4

    Greetings everyone, I have received my Watchmon 4 in the mail a couple of days ago and I have now finally found some time to play with it. There was a piece of paper on it saying I need to update the firmware first so I downloaded the toolkit software, plugged in the Watchmon 4 with USB but I...
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    18650s Germany

    Greetings, Selling my extra,good,18650s for all those who need cells in Germany. Impossible to sell internationally as DHL finds absolutely every battery you send by air and its all illegal. Dischargetest with OPUS BT-C3100at 1A. Brands are varied as always, Samsung, Panasonic, Sony, LG...
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    Influence of dynamic mechanical stress on lithium-ion-battery aging

    Some interesting info for all those smashing their packs on the ground to open them up. This is just some interesting information they gathered.
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    Evolve Skateboards Range Extender + Battery upgrade

    Greetings I have 2 Evolve electric skateboards. One is the Carbon 2nd Generation with the single motor and 10Ah battery and the other is the Bamboo 2nd Generation with single motor and 7Ah battery. I use it to commute every now and then (whenever I wake up with a pair big enough since Ive been...
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    BMS Wiring HELP!

    Greetings, I have a BMS here for a 36v battery and I dont know where to attach the battery + - and output / input. There are 4 spots. Balance leads is a 15 lead connector. 11 for for the cells plus 4 for 2thermal sensors. Can someone help? :) cheers
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    Communicating BMS's for 14s packs

    Greetings, Since Korishan answered on my thread about building single 14s packs to easily expand I am more and more intrigued to build this way. But going with Batrium is stupid for this setup. So do you guys know any 14s BMS's that can communicate with each other? So that each pack has its...
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    18650s for sale in Germany SOON

    Greetings, I will start selling my 18650s from laptop packs very soon. Let me know if your interested. Im in the south of Germany. Will be selling cells: Tier 1. - with over 90% of original capacity ranging from2000mAh - 2399mAh and internal resistance of under 100at 1,30 per1000mAh. So 2,60...
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    Keep it DC for EV charging

    Greetings, As the plan for my powerwall is to only store electricity from a 6KW solar array during the day and then put that electricity into an EV at night im wondering if its possible to simply keep it all DC. It will not be sending electricity to my house at all! Having an inverter switch it...
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    Damaged cells...

    Greetings, I have a couple damaged cells that I wanted to ask questions about. I have 2 NCR18650PF/D cells where the metal on the positive end is partly torn off. Im not planning on using them but does this render these cells useless? or are the cells in theoryjust as safe to use? I have 1...
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    J-Mans project

    Greetings everyone, starting a general thread here like everyone. Things are moving on well, tested about 600 cells so far ::) Im doing a practice run for the soldering and something doesnt seem right. If you look at the picture you can see the solder is just a ball sitting on the cell and...
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    Fire & explosion proof cabinets for safety.

    Im not seeing anyone place the battery packs into certified enclosuresor cabinets as a safety measure. How come? Im looking at speck sheets for NEMA 4 (and better)certified cabinets and so forth that I could use as the housing for my project since im thinking its the logical thing to do just...
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    How to set up my packs and HELLO to everyone :)

    Greetings everyone, Joined here yesterday and super excited to be part of this community. I have just started my project and I am not quite sure how to set up my packs because I have a somewhat different situation with my cells. So: I have 1600 cells that are all from hoverboards. It was...
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