Hip Street mp3 mp4 player battery replacment from a cell phone

I've had this Hip Street mp4 player for a while now. It, Like a lot of mp3/mp4 players has a built in li-ion (lithium ion) battery. The play time has never been great. but lately I've pretty much stopped using it because it's deteriorated so much, its down to about 1/2 an hour per charge....no good.
so i decided to do something about it

Step 1: The guts

Was a very simple disassembly 2 tiny screws, and the lid popped off, revealing the guts.

Comments

[Sandisk1duo]

not so easy to do with mp3 players that have batteries similar to cellphones (no wires)

[zack247]

yeah, but then you could just buy a new battery, right?

[zack247]

did the same idea for my palm zire 31 with a ds lite battery, unfortunately, the battery was old and has died, i'll look to find a 2000mah dsl battery to replace it with.

[namzer0]

haha! nice! I am doing the same mod as I am typing now... the battery is a Sony Ericsson BST-36 750mAh but it doesn't fit very well... I smashed it a little to flatten it a bit... later, I might smash it some more...

[Mikkun]

Great instructible! I have a few questions though:

Would you think this kind of replacement will work with a Nokia Battery(i.e. BL-5C or other BL-Series and other variants of it) or any other cellphone battery?

The Nokia Battery has no protection circuits(obviously the nokia cellphone has the circuits), will this guide still help?

Thanks for the great instructible, I may use this guide as I have an mp4 which is quickly degrading on playtime.

[eight]

Many thanks for your indestructible ! Maybe I missed it, but how long does it last now?

[LiporXT]

(excuse for English but I am Italian) but as you have made to close it? however compliments, it's really cool..

[Pyro667]

i didn't have to mod the case to close it, the side just swelled/bent out a little, i may order a different battery for it, I was looking at an old phone i have, Motorola c332, the battery in it is Really thin, 4mm, and its 750mah..so i may replace it with one of those off Ebay for cheap

[NathanWilliams]

Nice job! How much time do you get now from a full charge?

[Pyro667]

it was going for aprox 13h, then i wanted to put a new song on and plugged it in and forgot about it...so it recharged....but 13h hours is about 9h longer than i got from it brand new

[NathanWilliams]

That is awesome, congratulations!