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If I touch together the orange and brown signal wires, the charging works.

pin 1: positive+, pin 2: empty, pin 3: negative-

Sticker No serial number anywhere on the battery (other than on the BMS itself) Lotsa Polish text EAN: 5903317865711 - same on all of them Supposedly 14.4 Ah - that would mean 3600 mAh cells! Supposedly Samsung cells Display 4 green LEDs Simple...

The housing is made of two parts: Shiny plastic top layer, onto which the rubber mat is glued White plastic tub The battery is secured into the board by three metal twisting thingies, and they seem to go through both the plastic top part and the...

10S1P arrangement, Samsung 25R cells. (High power, low capacity!) The BMS does not actually have a switch, it just enables / disables the charger / device via communication. The BMS has a 40A car fuse soldered into the board. 3 pins: P+ COM P- ...

Battery 36V 15Ah - MH1/17.5Ah MJ1 BH 48V   9Ah MH1/ 10.5Ah MJ1 BH 36V 12Ah MH1/14Ah MJ1 Whale 36V (Down Tube Type) 15Ah MH1/17.5Ah MJ1 Black whale 52V 12Ah MH1/14Ah MJ1 ElectricxW 15Ah MH1/17.5Ah MJ1 Evo battery 36V 15Ah MH1/17.5Ah M...

  24V, 20Ah 8S1P LFP with pouch cells UART communication most likely In this battery, B2 was puffed and low voltage, the rest of the cells fine. The bucket is held together by 4 long M5 bolts, with H5 heads. The bucket is made of 3 parts There are 2 c...

We see three types of Wisper batteries, all 36V: Short brick Long brick Pillion (rare) We can do recells on all of them. The bricks have a common port BMS, and the lock switches the power line, therefore we can use the Daly BMSs! The short brick can f...

Feedback from actually building it The isolation plates need to be thicker and longer so that it protects the nickels hanging out.

How to open Remove the 4x 6mm HEX bolts - need LOTS of torque because they are glued Drill out the 3x pop rivets Pry off the metal plate Use a long metal ruler to cut the PU foam as much as possible Shake Repeat until it comes out. A messy pr...

NOTE: This battery needs a key, if the key is missing, to be able to discharge one should short the brown and orange wires. Using our holders We 3D print holders for this battery. They need an M3 threaded rod to keep the whole thing nice and tight. Rebu...

We like to use the Daly BMSs from AliExpress, because: waterproof no exposed components feels high quality never had a problem with them they are available in 15A to 500A 3S to 20S With or without balance - always get the with balance version!! Wi...

Remove the PH2 screws on the edge of the battery. DO NOT remove the T10 screws on top or bottom - they can stay in, they only keep the info plate on! Take out the four metal clips that hold the carry straps. Pry with a spudger around the corners - especiall...

These batteries are replacing the familiar NEE1009-W batteries. The NEE1009-W batteries are in use with various scooter rental companies in Norway and around the world. Battkomp has repaired some  NEE1009-W batteries with connector issues, but the repair proc...

We've received 6 batteries of the model TP-BA150H on 15th August. S/N Repaired before? Note Diagnosis Current status DSM2104021284 Yes, C1 was fixed (Batch 2) E4 Solder pad C1 broke off of substrate Fi...

This wiki-like know-how has been produced by Yedlik AS and Battkomp AS in the years 2020 to 2024 while working on batteries in Oslo, Norway. I started repairing e-bike batteries in April 2020, and built a company around it. The activity gradually changed and ...