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i need some help with charging nimh packs
i have a 5amp charger turnigy(same as b6)

i got a few packs
nimh - 6 cell 4500mah

nimh - 8 cell 5000mah

nimh - 6 cell 3400mah

what AMP do i charge these at?

you can charge up to 1C, meaning 1A per 1000mAh.
So 4.5A for the 4500
5A for the 5000
3.4A for the 3400 mah.

This should take roughly 1 hour.
If you divide the Amps by x, you ll need x hours to charge.. It is best not to go over 1C.

NiMh do not necessarily follow lipos 1C 'guideline'. Its a safe rate, but may not be an optimum rate.

I have 4000mah and 4400mah NiMh pacs and charge them both at 5amps. What you want in a charge rate is to acheive a balance between punch and runtime if you're bashing. If you're racing, you want more punch from the packs. This would typically be done with higher charge rates than what a basher would use.

The 4500 and 5000 pacs I would try at 5amps (bashing), the 3400 I would try at 4amps. Make sure thay don't get too hot - if you can hold them, they ar enot too hot. They shouldn't get more than 120-125F when they peak.

If these are new, start with lower rates for the 1st 10 or so charges, then start pushing charge rate. NiMh will show some improvement over 1st several cycles some call it breakin.

how do i get on when i want to charge my lipo 3000mah lipo 25c?

Lipos are different than NiMh, the recommended charge rate for lipo is 1C (capacity/1000) so for a 3000mah lipo a 1C charge rate is 3amps.

If the lipo manufacturer recommends higher than 1C charge rates, the lipo lable will usually tell you if the lipo can be charged at 2C or 5C etc.

Your manual will cover the rest of the details for lipo charging. Always balance charge lipos, its safer and better for maintaining the lipo at optimum conditions.