Pro-Peak Supernova won't charge Nimh

[madgooner99]

Don't no if anybody has same problem but my Supernova does not discharge or charge Nimh packs properly.

If i discharge a 2300 mah pack at one amp in manual mode it only says the pack is 600 mah......then charges it to about 750- mah. This is a new Tornado pack from Overlander......if i increase the dis/charge rate to 2 amps th Suprnova puts in even less

I've also noticed this on my other older pack

Any ideas.....

Thanks

Ray

[Mark J]

Cant really help with your charger, but I seem to get the same sort of probs with my Constellation charger, if I charge my battery at a set rate it hardly puts anything into the battery.
If I put it onto the automatic mode, it takes forever but puts more into it, but still not a full charge as if I reconnect the battery after its just finished and charge it again (still on auto) it easily puts a good few hundred Mah's into the battery, and can keep doing that for a good few more times etc.

does it on the battery for my Tx too, as thought it may be to do with the battery in the heli, but not sure!

[madgooner99]

Thanks Mark.....I'm thinking of investing in a new charger that can do polly's too......any ideas.....quit lik the Schulze Chamaleon Charger 6-330d at
http://fast-lad.co.uk/store/product_...67cbfeb09bf0a6

[stumpy]

are you connecting direct to the pack?
not via a switch or loom of any kind, as this will effect the "peak detect" of the charger.
also good quality leads and connections make a difference.

do you have a clubmate that can cycle your pack on another charger,
i have seen "NEW" packs before that are u\s.

just a couple of thoughts...

[madgooner99]

yes .....removed pack from transmitter......charging leads are not the best.....i'll make up new ones.......does the charger monitor the internal resistance of the pack and therfore dodgy leads increase resistance ?????????

I nomally solder 4mm gold connectors onto a Futaba lead/plug from an old servo......but is the wire is small to take 3 amps ?????

[stumpy]

the charger is looking for a "peak" in the voltage of the pack but with ni-mh its not as easy to detect as a ni-cd.

extra connections might upset it.

servo wires are NOT good for 3 amps

make some proper connectors up, most new high capacity flight packs come with a dedicated charge lead capable of taking at least 1C (3.3amps on a 3300 mah pack)
if i was using a new pack i would want at least one cycle were the pack gave up its full capacity(well almost)


just re- read your second post. transmitter packs are AA cells and although they have a capacity of 2300 mah they will not like being charged @1Cthey need a much lower charge rate due to internal resistance try 0.4 amp even thats quite high for those cells.

i see your in harold wood, where do you fly?
get a club member to charge cycle it as you may have a faulty charger
(had a supa nova for about 4 yrs trouble free, still use it)
DONT use that pack until you can prove its capacity

[madgooner99]

Thanks,

I have proved the new battery pack and i have also tried the Supernova on another nimh pack i've have had for over a year... but i don't use the Supernova to charge it 'cos it doesn't seem to work properly as described above.

I fly with West Essex Aeromodlers at Bulphan, Essex.......Great club and great members

I don't use the Supernova for nimh 'cos i don't have confidence in it.....think i'll upgrade the charger as posted before

[stumpy]

best of luck.