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E-bike battery guides

Repairs, recells, little tricks we learned along the way.

Biltema

Reset If the cells are not in deep discharge, the problem will be that the BMS goes into a fault...

Evoride 36V 3-led

These batteries have a dumb BMS that we can replace, and they have only 40 cells: 10s4p. The BH f...

Evoride 36V 5 led

These batteries have 50 cells, 10 each in 5 layers. It has a non-generic BMS that is usually not ...

Go Swissdrive 36V

GO SwissDrive went bankrupt in January 2019. The battery has a single Rosenberger connector that ...

TranzX 36V

If it does not charge, it can be reset by charging from the discharge. See photo for layout: C...

Ecoride 36V

The wish from the customer is 17.5 Ah - 50 cells need to fit into the box! I remember having done...

Derby Cycle / Kalkhoff / BMZ Impulse

The batteries are 36V, 10s5p layout, 11 to 17 Ah capacity. They go under the names Kalkhoff, BMZ,...

How to charge Derby battery w/o official charger

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

How to charge Giant batteries w/ XLR-3 connector

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

Ecobike 48V report

Sticker No serial number anywhere on the battery (other than on the BMS itself) Lotsa Polish ...

Water damaged BMSs

How many cells fit in different battery housings

Battery 36V 15Ah - MH1/17.5Ah MJ1 BH 48V   9Ah MH1/ 10.5Ah MJ1 BH 36V 12Ah MH1/14Ah MJ...

Wisper 36V

We see three types of Wisper batteries, all 36V: Short brick Long brick Pillion (rare) We...

Off Course 36V

Feedback from actually building it The isolation plates need to be thicker and longer so...

Promovec 36V with rear lights

NOTE: This battery needs a key, if the key is missing, to be able to discharge one should sho...