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#1
20-03-2010
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AA rechargeable batteries 1.2v no good
Hiya,
I've noticed a problem with trying to buy AA rechargeable batteries there all 1.2v useless no good for rc nitro car or remote I got. I got brand new fujimax 2800mah but 1.2v and wont power the reciver or car rs4 evo 3 rtr hpi. Batteries 4 in the car and 8 in the reciever. So basicly I'm after some AA ni-cd and ni-mh rechargeable batteries with 1.5v and a decent make with a good mah on them. I've been stuck trying to find some and there must be some out there cheap enough to buy in the UK!
__________________
hpi rs4 rtr 3 evo t-15 engine 
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#2
20-03-2010
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they always charge up above that, and most people use 5 of them instead of four
__________________
Mattys the driver,my names carl
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#3
20-03-2010
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Quote:
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#4
20-03-2010
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Hello I've sussed this problem out now its strange but I've fixed the problem!
 Basicly the car takes 4 batteries 1.5v etc. Anyway tried the fujimax fujicell 2800mah 1.2v batteries all in it wont work. So did a test swapped the batterys around with the normal ones. I've worked out I can have 3 recharable batterys fitted in 1.2v with a normal 1.5v as well. The 1.5v battery has to be in a certurn place for it to work so the car now works! The reciever the same thing 7 recharable batterys fitted in 1.2v then 1 normal 1.5v fitted in a certon place the reciever works now! Looking at it the 1.5v batterys are the first ones in the circut then the rest are behind it on the car and reciever! I'm not expert but I got the things to work now. 
__________________
hpi rs4 rtr 3 evo t-15 engine
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#5
20-03-2010
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Quote:
__________________
hpi rs4 rtr 3 evo t-15 engine
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#6
20-03-2010
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Just tried something else which should be fine with not mixing batterys with 1.5v and 1.2v not safe......
In the car I can put 3 batterys 2800mah 1.2v and 1 battery either 650mah, 700mah and 800mah 1.2v all reacharables then. The reciever just tried the samething I can put 7 batterys 2800mah 1.2v and 1 battery either 650mah, 700mah and 800mah 1.2v all reacharables then. Will this be fine now there all 1.2v and reachargables?
__________________
hpi rs4 rtr 3 evo t-15 engine
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#7
21-03-2010
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One problem you might be experiencing is the rechargeables are sometimes very slightly shorter than the alkaline type, not making a good circuit.
Basically the positive contact, others on a Crawler forum have sussed it out and put a tiny blob of solder on it and then sand it down to fit perfectly between the RX or TX contacts. The voltage total does not seem to matter, wether 4.8v or 6v to them anyway. Hope this helps 
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#8
21-03-2010
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Do not mix cells of different chemistry
Do not mix cells of different capacity Do not mix cells of different state of charge. Do buy a welded five cell NiMH rechargeable battery if possible. Neil
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#11
23-03-2010
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Just tried duracell rechargeable batteries both 2450mah accu and 2000mah active they work in the reciever and the car fine.
So I will use 12 AA duracell 2450mah rechargeable batterys for now. To see how I get on with those for now as there working fine at the moment. 
__________________
hpi rs4 rtr 3 evo t-15 engine
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#12
28-03-2010
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sounds like the cells you were trying cannot produce sufficient current without excessive voltage drop. have had this happen with cheap cells before, they worked fine in radio etc. but rx and servo's were too much and dragged them down to .5 volt per cell when fully charged
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