Posts Tagged ‘2S


2S 6.6V 2000 mAh Robitronic LiFe batteries are intended for use as a receiver battery packs in remote control models such as nitro cars – to power the servos for throttle and steering as these cars use fuel not electricity for their engines. The good thing about LiFe batteries is the fact that they have much steadier discharge curve than traditional LiPo batteries, so they can provide a more constant voltage under load in almost their full capacity. Since however the manufacturer or the brand Robitronic that these batteris go under does not give a lot of details we’ll need to check how good these batteries actually are. The 2S 6.6V 2000 mAh Robitronic LiFe battery uses two cells to provide 6.6V and each cells consists of two smaller capacity cells that should be 1000 mAh each meaning that the battery is 2S and 2P (two cells in series and 2 in parallel).

Official Battery Specifications:

– Capacity: 2000mAh
– Voltage: 6.6V
– Dimensions: 56 x 32 x 32 mm


Starting the tests with a 0.5C discharge rate (1.0A) for the 2S 6.6V 2000 mAh Robitronic LiFe battery we’ve managed to get 1.77 Ah as a maximum capacity, a value that is a bit shorter than the official rating of the battery. So it seems that instead of 2000 mAh this LiFe battery is more like 1800 mAh and the good thing is that it can handle very well higher loads such as 10A constant discharge while still providing almost the full capacity it offers. Not that you will need constant loads of up to 10A for the servos in an RC model, but you can be sure the battery can handle even higher peaks without problems.

The performance of the 2S 6.6V 2000 mAh Robitronic LiFe Battery in our tests:

– 1.77 Ah at 1.0A load (0.5C)
– 1.76 Ah at 2.0A load (1.0C)
– 1.75 Ah at 5.0A load (2.5C)
– 1.73 Ah at 10A load (5.0C)

What you should have in mind though is that as with other small batteries that use thin cables passing higher current such as 10A or even higher as a constant load is not a good idea as they will get hot and may melt and short the battery, and that is something you don’t want for sure.