6 X AAA charge in series

Hi guys
i want to ask is it safe to charge 6xAAA batteries in series?
i’m planning to combine this with Ni MH battery

it is safe to charge nimh in series - but always use a low charging current

i regularly charge a 16 AA nimh pack (all in series), however i charge it at 200 or 300ma on a hobby charger… and cells that are overcharged will burn off excess energy in the form of heat, the low current prevents them from getting to hot (i also use a temperature probe to monitor while charging)

at the charger cradle it say
DC 8.4V 400-450mA
is it safe?

what is the capacity of the batteries?

if the capacity is 2000mah then thats around 0.4c

i would be very hesistant to use a charging cradle for a 6s pack and not a hobby charger unless its known to be reliable and have a temp shut down if it gets too hot

normally it using Li Ion 7.2V 1200mAh.
with this case and AAA NiMH eneloop about 800mA or less