As you can see by the picture, you can perfectly fit a 703048 LiPo battery inside of a DS Lite. It's rated for the same 1000mAh, and roughly the same size. I'll be cutting off the 2.00mm JST connector and adding my own 1.25mm JST connectors instead. You could always solder it directly if you like as well, but I prefer easy removal with minimal soldering to the unit itself.
View attachment 263738
UPDATE: Battery mod completed!
Soldered up:
View attachment 263741
Testing the battery out:
View attachment 263745
Fitting it perfectly inside:
View attachment 263740
Putting the cover back on:
View attachment 263744
Making sure it's flush and flat:
View attachment 263743
Perfection:
View attachment 263742
View attachment 263738
UPDATE: Battery mod completed!
Soldered up:
View attachment 263741
Testing the battery out:
View attachment 263745
Fitting it perfectly inside:
View attachment 263740
Putting the cover back on:
View attachment 263744
Making sure it's flush and flat:
View attachment 263743
Perfection:
View attachment 263742