Oset battery 29.2v For Oset 12.5R 15Ah Lithium Upgrade with digital fast charger.

Lasts 3-4 times longer than standard batteries and weighs about 1/4.

Picture isn't of the exact battery but will update soon.


This is the super lightweight model where maximum performance is preferred over longer runtime.


The only aftermarket battery that is IP65 rated.


Manufactured in the UK.


2.6kg.



Fits Oset 12.5 models.


Comes with a choice of connectors for your bike.


Lithium batteries have a very flat discharge curve, which makes the standard power meter less accurate.

When the batteries is discharged there is a safety cutout to prevent battery damage.

See screen shots in pictures.

We also have batteries for 16, 20r, 24 and MX10.


Please contact us to discuss your requirements.


Over 8kg saving over lead acid batteries.


All our packs are built in the UK using a rigid case and high current battery bars spot welded to the cells.


Be aware of other batteries which are not IP rated and don’t have cell spacing which causes them to run hot.

Rigid battery case to protect the battery with carry handle.


High current silicone cable.

Batteries come with a Velcro strap to fasten them into the bikes. (Similar to genuine Oset battery)



All cells used are grade A genuine branded cells. Anticipated life is over 1500 cycles.


Battery dimensions are 155mm x 120mm x 95mm


Cells are mounted low to keep the COG low with the BMS above.


Everything is included to convert over to lithium and full installation instructions will be included for a hassle free install.


A 2 year warranty is included. It is important the battery is recharged after use and checked every 6 months.

The IP 65 rating makes the battery fine to use in adverse weather. However it must be removed if you pressure wash the bike.

Warranties will not be honour if the battery has water damage or has been opened. Tamper proof stickers must be intact.


The battery has onboard data logging and diagnostics via a phone app.


Can be supplied with 50 amp Anderson connector. Including pre wired connect for your bike. These are the lightest and easiest to disconnect.


Alternative we can supply with XT90


Battery should be recharged straight after use.


It is safe to charge the battery immediately after use, it has in built temperature and current compensation.


The digital charger tells the user the charge current (6a max) voltage power and temperature at a glance.


The free Bluetooth app can also be used to see exact cell data and charge information.

10-90% charge in under 2 hours.


First 3 packs sold on eBay will be just £375