I have a MP-FMZH1.1 2004-11-10 V5.0(ACTION) and I like connect a battery of 3.7v, but not a alkaline battery.
I try this actions including diodes for limit the voltaje, but I can recharge whit my PC, she it's locked.
How to change my battery.
Other thing, I have a HY27UA081G1M in this player, and I have too a HY27UA082G2M, I can change this too??