What battery is good for ordinary radios?

Ordinary radios generally use aa or aaa dry batteries, which can be replaced by Ni-MH or Ni-Cr batteries of the same specification. However, most radios themselves do not provide charging function, and although some models of radios provide charging function, they are generally limited to the designated batteries of the same brand, and the charging control of these radios with charging function is very simple, and it is easy to charge with the designated batteries. Therefore, it is suggested to use a special intelligent charger with rechargeable battery to supply power to the radio.