How to charge such a nickel battery?

Question

Arduino

Hello, I stole such a battery
. But I don’t know how to charge, it says on it that it is

• nickel
  
• 6.0V
  
• 800mah
  

I want to use it in my killbot-robot-assistant, the Akum is inserted into the case, these two wires go to the button to turn on the power, I want to solder two more and send them through the case for charging, but how to do the charging? How many volts to apply to it, how to understand when it is charged, how to make it as cheap as possible and what would not explode? I want to charge him with USB, but I don’t know what to do in terms of volts and amps, I have a bunch of chargers from phones, as material

Answer 1

a pack of five series-connected Ni-Mh batteries.
5 * 1.2 = 6 volts.
charging according to the standard Nimh scheme: delta-peak or temperature.

Answer 2

Everything is written here .

Answer 3

From USB , universal .
If suddenly nothing suitable, then in this thread there are a lot of articles with working schemes and calculations / explanations.

Answer 4

"killbot-robot-assistant" sounds powerful, try using professional solutions, not a homemade collective farm
www.ti.com/lsds/ti/power-management/battery-charge...