TranzX Battery Cell Replacement Service

TranzX is a company that makes parts for a number of e-bike manufacturers, including batteries. When the battery dies though, replacements can be tough to come by. That's why we offer our rebuild service! Send in your battery, we replace all of the cells while re-using your case (so it's guaranteed to fit back in your bike), and send it back to you! Often, we can upgrade the capacity to give you longer ride time as well!

TranzX BL17

Here's the popular TranzX BL17 model battery that's used on iZip E3 Dash, E3 Peak, and E3 Sumo model bikes, along with the Raleigh Tekoa, Route, and Misceo, among others. It fits on the downtube. We can upgrade these from 417 Wh to 504 Wh with our 10.5 Ah rebuild.

Raleigh Sprite Battery

This is the TranzX BL07, a rear rack model, that Raleigh used on some of their electric bikes like the Retroglide, Superbe, and Sprint. We can also upgrade these up to 14 Ah using our rebuild service.


134 comments


  • Graham Smith

    Hi, my BL07 has been idle for more than a year. Now it doesn’t charge – given I’m faced with repair/upgrade or buying a new one can you let me know what you can do and what cost I can expect?


  • EBike Marketplace

    @David – We’d be happy to rebuild and upgrade your battery for you. We’ll be in touch with pricing.


  • david greened

    I have a raleigh spirit which has a fading bl07 tranzx battery on it. Can you price up a replacement or a rebuild to 10.5Ah for me please? I am at LL55 3PG in the UK.


  • EBike Marketplace

    @Mark – It’s likely the battery is dead. We can rebuild and upgrade it to 48V 10.5Ah for you:

    https://ebikemarketplace.com/products/currie-i-zip-e-bike-battery-replacement?variant=16768804552775


  • EBike Marketplace

    @Joe – We’ll be in touch with our current options.


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