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LiPo for Model Rail

Despite their bad reputation, LiPo cells and batteries are safe for use in model rail so long as some simple rules are followed:

  • never charge above 4.2V per cell, use a decent charger
  • always balance charge multi-cell batteries
  • never discharge below 3V per cell (the Deltang receivers cut off the motor at 3V per cell)
  • never short, use an inline resettable fuse as close to the cell/battery as possible
  • never puncture or subject to blunt force trauma
  • never subject to a temperature below 0C or above 50C

All of these LiPo are fitted with a 2.5A resettable fuse to protect the cells in the event of a wiring fault (or operator error/fumble!). Thus, the max charge or discharge current for any of these cells/batteries is 2.5A.

The smaller (< 1000mAh) multi-cell LiPo are fitted with a single Molex 2mm power and charge/balance connector. This is wired using 'Nine Eagles' convention which has pin 1 negative. The wiring colours are:
Colour 2S 3S 4S
3 pin4 pin5 pin
blacknegative (0V)negative (0V)negative (0V)
yellow3.7V3.7V3.7V
whiten/c7.4V7.4V
greenn/cn/c11.1V
red7.4V11.1V14.8V

LiPo cells and batteries cannot be sent via airmail or on their own via UK post. Please see LiPo Shipping for details.


Click on image for a larger version.
1300mAh 4S 25C For G Scale Loco

A compact sized 1300mAh 4S (14.8v) LiPo battery with Molex 2mm connectors for charge/balance (5 pin) and power (2 pin). Protected by a resettable 2.6A fuse.

£ 19.45

2200mAh 4S 25C For G Scale Loco

A compact sized 2200mAh 4S (14.8v) LiPo battery with Molex 2mm connectors for combined power and charge/balance (5 pin. Protected by a resettable 2.6A fuse.

£ 19.95

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