Battery Voltage (quick question)
10-16-2008, 10:19 AM
#1
Battery Voltage (quick question)
Just to check, sorry if this is a stupid question. The voltage on a 7.2V battery can be higher than 7.2 yes? It's reading 8.4 at the moment.
Thanks.
Thanks.
10-16-2008, 10:29 AM
#2
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yeah, peak voltage is higher but will drop when power is drawn.
10-16-2008, 10:31 AM
#3
10-16-2008, 05:15 PM
#4
Limerick91
NiMh batteries are rated at 1.2 volts per cell (7.2 for a 6 cell pack)
LIPOs are rated at 3.7 volts per cell (most used in RC are considered 2 cell, so they'd be 7.4)
It's been a while since I did voltage testing on a NiMh type pack, but I just got finished testing some of my lipos.
Peak Charge
8.44v
Voltage as I pulled it off the charger
8.38
Voltage with ESC turned ON (w/o giving any throttle)
8.21
Voltage approx 5 seconds into a run (using a 17.5 Brushless motor)
7.85
Voltage at the end of a 5 minute race
6.96
mAh's used 1850
average amp draw 22 amps
Data was obtained using the EAGLE TREE MicroPower E-Logger system and a CHASSIS Dyno
NiMh batteries are rated at 1.2 volts per cell (7.2 for a 6 cell pack)
LIPOs are rated at 3.7 volts per cell (most used in RC are considered 2 cell, so they'd be 7.4)
It's been a while since I did voltage testing on a NiMh type pack, but I just got finished testing some of my lipos.
Peak Charge
8.44v
Voltage as I pulled it off the charger
8.38
Voltage with ESC turned ON (w/o giving any throttle)
8.21
Voltage approx 5 seconds into a run (using a 17.5 Brushless motor)
7.85
Voltage at the end of a 5 minute race
6.96
mAh's used 1850
average amp draw 22 amps
Data was obtained using the EAGLE TREE MicroPower E-Logger system and a CHASSIS Dyno
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