Lipo Batteries

[scottb]

Here are the lipo's i have in the Losi Pete

Cheers
Scott

[towie964]

total combined voltage is 7.4v, I grabbed the specs from their web-site for you

Specifications:

ROAR Approved
Battery Type: Lithium Polymer (LiPO)
Configuration: 2s2p
Weight: 9.17 oz.
Dimensions: 23 x 46.2 x 69mm
Charge Rate: 3C (12.6A)
Continuous Discharge: 30C (126A)
Min Discharge Volts Per Pack: 6V
Max Burst Rate: 60C (252A)
Max Volts Per Cell: 4.2V
Max Volts Per Pack: 8.4V
Watt Hours: 31.08

So as I understand it, the seperate packs are equal to 1 cell and when connected up via the leads in series you end up with 2cell 7.4v 4200mah, just to be safe, run a multimeter on the packs and check the voltage, they should read between 3.7v and 4.2v each pack, and when connected between 7.4 and 8.4v combined.

where are the 2 battery gurus when you need them?,

Paging Dr cdis.....Paging Dr Big Block,...... got a technical problem for you

2s2p = 2 cells in series, with 2 cells in parallel internally per saddle pack

[scottb]

Yeh when i tested both saddled the voltage read around 7.4v
So like you said i've only 4200mah combind.....dam i thought i had 8400mah....this is why i'm getting short run times.

Thanks Pete

[towie964]

Glad it is sorted

[scottb]

Just one thought...why does it say in the specs....Charge rate-3C (12.6A). ?

Scott

[towie964]

Under normal conditions, most Lipo batteries can be charged at a maximum of 1C, but these are capable of being charged at 3C

to get "C" value

divide the mah rating by 1000 = "C"
4200mah / 1000 = 4.2 amps
so you could charge at 4.2 amps for a 1C battery
your battery can be charged at 3C= 12.6amps

most chargers are not capable of charging at this rate,
at 1C your battery will take approx 1 hour to charge, at 3C it will take about 20 minutes

[scottb]

Wow Pete....you the man.
I"m all new to this electric thing,i've had nitro's for to long.
Thanks again for your quick & efficiant replies mate.

Cheers
Scott

P.S. I should'nt be bothering you again......i think its sunk in to my mega thick scull.

[damo1275]

im using a energee rc hard case lipo in my losi crawler comp only costs around $30aus inc post from fleebay.
180405119398

its a a123 2s2p 3000mah 25-30c 231grams

i had been using the pack in my onroad car but upgraded to zippy 5000mah

only mod needed was to extend the battery tabs too make it into saddle pack fits great in the stock lcc battery tray.

[scottb]

Thanks Damo....i allready have these lipo's in my losi,just a bit confused with the actual mah of them both joined together in series.



Scott

[Stangas]

I just purchased the Intellect 2300 reciever lipo 2S2P battery. Footprint of only 56 x 32 x 32mm.

Going to sit it on the front axle of an AX10 with the 3racing servo/battery mount. Will let you know how that goes.



Doing behind the axle steering at the same time, but found postage outragous for the link so gonna make one myself.