OSET 20R Batteries

[Jonboy]

Hi Guys, just wondering if anyone has upgraded the stock 10ah SLA batteries with with lipo or similar? My lads bike is great but duration is poor... I'm thinking 12s 2 or 3p. the new hobbyking multi rotor batteries may be the way forward? I've not had a chance to measure what the stock contoller lvc is so not sure as to where I stand running a lipo setup., If it's to high I'm not going to get the benifit of big capacity if to low I'm looking at adding a CA or something like it to monitor the volts.

Any thoughts?

 

[gwhy!1]

lots of people have done it and it improves runtime and power... You need to be 100% confident on how to maintain Li chemistry batterys as you can not treat them just like sla's

 

[Jonboy]

Hey thanks for the reply.. I'm ok with lipos as fickle as they are! What sort of configurations have you seen? I've done a bit of digging apart from a lithium pack on eBay & some race car engine starter lithium bats that's about all I've seen. Be interested in any links or info you may know of.
Thanks

Jon

 

[gwhy!1]

no worries.. I just thought I had better mention it as I have recently been told about 2 house fires that involved oset users and lipo conversions ( I waiting to get more information on the root cause ) .. Ok, Have a look on trialscental there is a whole thread dedicated towards converting from sla's http://www.trialscentral.com/forums/topic/34845-oset-batteries-lithium-lipo-conversion-directions/ HK (hobbyking) now also do lifepo4 packs , these are not quite so worrying as lipo but still care needs to be taken .. earthX batteries do a oset battery conversion but these are very expensive and you can save around 50% on the price if you buy the lifepo4 packs and put the battery together yourself.

Edit:
Just looked at your other threads .. ok so I can see your already been introduced to lipo .

 

[Jonboy]

I'm an old RC heli flyer so seen them from the start.. The only helis I have now are "E" ! earthX was what I was referring to with race car starter motor bats..

OK just clicked the thread.. thanks for my sunday evening read! Shit all on Tele... I guess it's just as Piissin down in brizl? can't even walk the dog!



Cheers

jon

Cool thread.. I need to crack the LVC situation then job done. Looking to upgrade my raptor batteries real soon as I ride with the petrol dirt bikes my rapy has 12 5amph turnigy packs which should be a gift to the oset!!

 

[Sean9002]

earthX batteries do a oset battery conversion but these are very expensive and you can save around 50% on the price if you buy the lifepo4 packs and put the battery together yourself.

yep don't bother with the Earthx, speaking from experience. If I knew then what I know now, I wouldn't have a set of them.

 

[gwhy!1]

Im currently testing some lifepo4 packs from hk. So far they are looking good . they are a little more expensive than the lipo but for anyone that wants peace of mind it may be worth it.

 

[Sean9002]

Im currently testing some lifepo4 packs from hk. So far they are looking good . they are a little more expensive than the lipo but for anyone that wants peace of mind it may be worth it.

Keep us updated on that! I will need to replace the earthx setup for more range. What size packs have you tried and is this with the stock motor?

Inside the EarthX batteries

 

[gwhy!1]

Thats intresting, the pic I saw on your picture site the earthx had cyclindrical cells and these have pouches .. Anyway I have been testing the zippy 8.4ah 30C lifepo4's ((4s2p) same configuration thats used in the earthx batterys that i have split apart but looking at your earthx'x it appears to be 4s1p :? ) configured as a 16s2p ... they performed well with bursts of 140A with no major voltage sag.. stayed in good balance after 4 cycles, no major heating, capacity was correct and more of a true 48v battery ( flatter discharge voltage than lipo ) .. this was the good stuff now the bad around the same weight as a 10ah 12s lipo around the same size as a 12s 10ah lipo and cost more than a 12s 10ah lipo.

 

[Sean9002]

Thats intresting, the pic I saw on your picture site the earthx had cyclindrical cells and these have pouches .. Anyway I have been testing the zippy 8.4ah 30C lifepo4's ((4s2p) same configuration thats used in the earthx batterys that i have split apart but looking at your earthx'x it appears to be 4s1p :? ) configured as a 16s2p ... they performed well with bursts of 140A with no major voltage sag.. stayed in good balance after 4 cycles, no major heating, capacity was correct and more of a true 48v battery ( flatter discharge voltage than lipo ) .. this was the good stuff now the bad around the same weight as a 10ah 12s lipo around the same size as a 12s 10ah lipo and cost more than a 12s 10ah lipo.

Yeah that was the picture I had attained from elsewhere, thinking I had A123 Cylindrical cells in side. According to the very limited info I could get out of Earthx, When they changed their Cell management, they changed to pouches (that was what I was trying to convey in the PM's).
I can only see 3 sense wires coming from the pouches. Each group is sitting at exactly 13.1v. Is there something Im not understanding here? :lol:

 

[gwhy!1]

Its 1 wire per join and the main + and - , it is 4 cells so there are 3 joins

 

[Sean9002]

Its 1 wire per join and the main + and - , it is 4 cells so there are 3 joins

Nice one! thanks