Quote:
Originally Posted by Ashlandchris
I've recently built a team c Jekyll with my son and installed a simple brushed motor and ESC from Absima. When I have test run it with LRP 4400mAh 7.2 stick pack the car is totally dying after a relatively short run. When I plug batteries in the charge they are showing 7.6-7.7 volts and when I charge at 1A they are going to approx 8.5v, but then only powering the car til they drop to 7.6ish. The steering is still working, but just no power for motor.
Is this normal? How long should a Nimh last on a full charge?
Any help gratefully received
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1A seams a little low charge rate, from a dead 4400mah battery it would take a long time to charge it about 4.4 hours....the charge rate should be around the same as lipo 1c so for your battery 4.4amps or lower. the way in which they charge is very different to a lipo. most decent chargers use delta peak voltage cut....basically the battery reaches a peak or max voltage under charge we'll say 10.04 volt for argument sake.... now when it reaches this max point the voltage actually starts to drop.....so it will hit 10.04 for example then as you keep charging it will drop to 10.03, 10.02 etc most chargers with delta peak will shut the battery off when it drops by around 0.04v....so in this case when the battery drops to 10.00v the charger will shut off as this is its fully charged point. on a temp charger i would say the battery would be around 38 degrees c....so quite warm really.....hope this helps
