lockys96 Posted May 19, 2008 Share Posted May 19, 2008 spent £30 on a uniross charger designed for nimh rechargable batteries. bought 4x AAA duracell 800 nimh batteries costing £15 now, i have a new mini car mount camera, but something isnt right with these batteries. i get more filming from standard alkaline batteries. i charged them prior use, and never really worked well with the camera, they can switch it on, just no juice to start the filming function. the charger says batteries are compatible if the green light flashes and not if its red, they are green. what a waste of money, help:( Link to comment Share on other sites More sharing options...
Al Massey Posted May 19, 2008 Share Posted May 19, 2008 what is the volts and the amp hour capacity of the batteries? Link to comment Share on other sites More sharing options...
merckx Posted May 19, 2008 Share Posted May 19, 2008 what is the volts and the amp hour capacity of the batteries? AAA duracell 800 nimh Is this the 15 min Uniross charger, are all regargeable batteries capable of being charged up so quickly? Link to comment Share on other sites More sharing options...
JustGav Posted May 19, 2008 Share Posted May 19, 2008 Nimh batteries have a slightly lower voltage around 1.2v compared to alkaline 1.5v... so it does add up, 4.8v compared to 6v. The camera might have an internal 5v regulator which means it has some losses over the 6v to get to 5v, whereas 4.8v can't be bounced up. Link to comment Share on other sites More sharing options...
Al Massey Posted May 19, 2008 Share Posted May 19, 2008 800 cant be the ahc its phisically impossible Link to comment Share on other sites More sharing options...
JustGav Posted May 19, 2008 Share Posted May 19, 2008 800 cant be the ahc its phisically impossible 0.8amh... 800millamp/h Link to comment Share on other sites More sharing options...
lockys96 Posted May 19, 2008 Author Share Posted May 19, 2008 think charger was 1hr charge. thing is 1.2v nimh batteries say equal to 1.5v alkaline i dont know any 1.5v nimh batteries Link to comment Share on other sites More sharing options...
JustGav Posted May 19, 2008 Share Posted May 19, 2008 think charger was 1hr charge. thing is 1.2v nimh batteries say equal to 1.5v alkaline i dont know any 1.5v nimh batteries They provide slightly more wattage over time, however alkalines by their own chemical nature generate 1.5, whereis Nicd and nimh operate at nominal voltage of 1.2v for a long time. The problem is CMOS kit requires 5v (which is probably what your camera is)... Initially with a full charge the NIMH's will push around 1.4v, giving 5.2v which will provide you with the 5v for the camera, however once they settle down to the usual 1.2v, the resulting 4.8v is not capable of driving a 5v CMOS Does that help? Link to comment Share on other sites More sharing options...
lockys96 Posted May 19, 2008 Author Share Posted May 19, 2008 it does, but i wanted to use rechargable ones. as cant spent £4 on batterys each time to run over 1hr to 2gb sd card Link to comment Share on other sites More sharing options...
JustGav Posted May 19, 2008 Share Posted May 19, 2008 it does, but i wanted to use rechargable ones. as cant spent £4 on batterys each time to run over 1hr to 2gb sd card An alternative is to build a microbattery pack with 5xNIMH batteries and a 5v regulator (If it has a 5v input that is) Link to comment Share on other sites More sharing options...
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