How can I find a replacement battery pack, Model No. PL-NiMHHC for my Mustek Model MP70C Portable DVD Player?

SOURCE: portable mustek dvd player

try this: power up your dvd without a disc. using your remote keypad input 9735. a secret menu should apprear. select your region code or choose 0 which will allow all discs to play. this will work with the mp70c but not with all mustek models. other solutions are available with an exhaustive google search

SOURCE: PORTABLE DVD CANNOT PLAY

Hi there this hack worked with my pl510......thats if you haven't already sorted it.

This Hack works on the PL510 and Pl510T
The PL510 & PL510T player is not Multiregion by default. To activate this player as Multiregion complete following instructions.
· Turn on your player.
· Close DVD disk door without a disk inserted.
· Press the following sequence of keys on your remote
control.
· Press "SET-UP".
· Press “Next” & then “Prev”.
· Again press “Next” & then “Prev”.
· Region # appears on top right hand corner of your TV
screen (1-6 being your existing region code)
· Change version (region) by pressing < button until 255
appears (correct code for Multiregion).
· Press "SET-UP" again & scroll down to exit.
· Press " SET-UP " again.
· Insert DVD disc and play.

SOURCE: Hello, I need a replacement

You can try remotes.com

SOURCE: MUSTEK 7" pORTABLE dvd PLAYER lcd PROBLEM

You might need to adjust the settings by pressing the LCD button then using the up/down/left/right arrows on the player or remote to change color or brightness. If this doesnt work, your screen might be shot. There isn't much you can do if thats the case.

SOURCE: My MUSTEk MP-100 does not load avi (DVIX/XVid) files

The player actually loads divx (.avi) format files. It does not loads some .mp4 format files.