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36V 12.5Ah Small Triangular Bag eBike Battery

£310.00 inc VAT

These fantastic bag batteries fit many smaller frames that will not hold a standard downtube battery.

They are made to order, so please be aware that delivery time will be extended.

Categories: , Product ID: 9117


These batteries come in a tough bag designed to fit within small frames, such as those found on full suspension bikes.

We use good quality branded Samsung cells. We use a BMS to protect your battery. These offer Over-Current Protection, Over-Discharge Protection, Over-Charge Protection, Short-Circuit Protection, Balanced charging

The battery comes with an XT60 connector.


We have added sizing information to the gallery – please check against your bike before purchasing.

The battery weighs around 2.5KG

Packaging Content

  • Battery pack and padded tough bag
  • 2A Charger


1 year warranty based on purchase date. Please return to us for repair or replacement.

Capacity Testing

Please see the tab ‘Battery Capacity and Testing’ (above)

Important Advice

  • Do not short (join) the positive and negative wires of the battery
  • Do not reverse the polarity when connecting to the motor
  • Do not expose the battery to very high temperatures
  • Do not submerge the battery
  • Do not disassemble the battery
  • Do not use any charger unless it has been designed to charge this type of battery
  • Please consider the environment when disposing of this battery



Additional information


Maximum Charge Rate


Maximum Discharge Rate


Battery Type

Battery Capacity and Testing

We test a sample of all of our batteries to ensure that they have the capacity we advertise, and to ensure that they will meet the demands of an ebike.  We’re probably one of the few UK based battery suppliers that actually publish discharge graphs of our batteries. The following graph shows this battery (36V 12.5Ah) discharge tested to 20% capacity. Fully discharging a battery can damage it so we always leave 20% of charge (your motor normally does this for you).

As the measured capacity is 10.57Ah when discharged by 80%. This means when the battery is fully discharged by 100%, the capacity is 13.21Ah – so it is actually a little larger than we advertise!

Follow this link to find out more about how big your battery needs to be



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