Hyperion duo3 used what is the smallest light weight power supply I can use?
08-05-2010, 04:31 PM
#16
Tech Fanatic
iTrader: (13)
A BIG X2.....ive had no issues with my Duo3 and charging 2 4S 5000's at 5A....power supply fans turn on from time to time...but nothing to be concerned about......Price and Size/Weight was a big Thing for me and the difference in size/weight from the Muchmore to the LRP was negligible but he price was the breaking point....got the LRP for 60$ used from a local racer i race with in the US(couple hours south of me)
Slap a Wrap on it -WHEELMAN- and call your bud's crazy....what LRP....lol.
Slap a Wrap on it -WHEELMAN- and call your bud's crazy....what LRP....lol.
How are you charging a 14.8Volt 4s battery with a only 12volt power supply?
08-05-2010, 06:42 PM
#17
08-05-2010, 10:14 PM
#19
Tech Master
iTrader: (3)
Most dc powered chargers require an input between 12 - 15 volts
The charger output to the batteries has nothing to do with the input power supply
Chargers internal circuitry looks after the rest
You can still charge a 6s (25.2v) pack with a 12v powered charger
Typical example :
To charge a 6s (5000mah) pack at 1c (5.0 amps) would require power output of
25.2v x 5.0 amps = 126 watts
Assuming a 12v supply to work out what current you require simply divide 126 watts by 12v
126w / 12v = 10.5 amps
Chargers are usually inefficient by 20% or so so its worthwhile adding 20%
126 watts + 20% = 150 watts
So to charge a 5000mah 6s pack at 5 amps you need a 150 watt capable charger
Smaller chargers will still charge the pack to capacity, they will just take longer as the charging current will be limited
Using the same example a 50 watt charger charging the same pack would take around 3 hours, compared to 1 hour with a properly specc'd charger
Cheers
The charger output to the batteries has nothing to do with the input power supply
Chargers internal circuitry looks after the rest
You can still charge a 6s (25.2v) pack with a 12v powered charger
Typical example :
To charge a 6s (5000mah) pack at 1c (5.0 amps) would require power output of
25.2v x 5.0 amps = 126 watts
Assuming a 12v supply to work out what current you require simply divide 126 watts by 12v
126w / 12v = 10.5 amps
Chargers are usually inefficient by 20% or so so its worthwhile adding 20%
126 watts + 20% = 150 watts
So to charge a 5000mah 6s pack at 5 amps you need a 150 watt capable charger
Smaller chargers will still charge the pack to capacity, they will just take longer as the charging current will be limited
Using the same example a 50 watt charger charging the same pack would take around 3 hours, compared to 1 hour with a properly specc'd charger
Cheers
08-05-2010, 10:20 PM
#20
08-06-2010, 02:10 AM
#22
08-06-2010, 06:37 AM
#23
Older linear style chargers could not charge battery packs of higher Voltage than the input.
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