[CrashBangWallop]

I have just bought one of the new SKYRC Chargers, the RS16. It's a bit more than your £50 budget for one charger but is VERY accurate.

I have checked the output voltages while charging a 2 cell Li-Po pack vs the 'claimed' voltage on the screen against a calibrated multi-meter.

The voltage on the screen said 8.40 volts when fully charged but, here is the good bit. The individual cell Voltage was actually 4.18 Volts on the multi-meter which is a 100% charge for a Li-Po and you can play around with the end voltages if you want in the memory settings.

Hope you find this helpful.

Oh BTW before this charger I was using a Turnigy Accucel 6 and it works ok but don't expect the end voltages to be accurate!