charging a 8.4v nimh pp3 battery

[m3vuv]

Hi all,its a simple question but im struggling to find answers to it,i have a mimh 170mah pp3 type rechargable battery in my multimeter that needs charging,ive  lost my charger but have a lab psu cc+cv,i know its ok to charge it at 10/c but what voltage,the battery is marked 8.4v,cheers m3vuv.

[tunk]

If you go to https://lygte-info.dk you'll see that
a fully charged NiMh is 1.4-1.5V per cell, so I
guess 10V would be ok.

[Dabbot]

Set voltage to 9.8V, current to 17mA and charge for 15 hours.

[Zero999]

If the battery is marked as 8.4V, then it has it has 7 cells: 1.2V per cell. To fully charge it, the voltage needs to go up to 1.5V per cell, so you need an open circuit voltage of 7*1.5 = 10.5V.

It's generally safer to charge at a low, rather than high current. Set the voltage to 10.5V, the current to 9mA and charge for 24 hours.

[james_s]

As long as the current is limited, the voltage can be higher and it won't matter, the battery will determine the voltage.

[m3vuv]

thanks all.