I believe that depends on the place where you are trading it in and their policy. Best is to ask them if you have to trade the charger in too.
no the ds charger is not the same as the dsi charger and the ds charger will NOT work on the dsi
It will cost around $10.00.
That depends what ds charger it is. If it's the charger to a ds lite or ds i, no. It will be to small. If it is the charger to an original ds, then yes.(I've used an original ds charger for my gameboy before). It also works the other way around. Gameboy chargers work on the original ds.
it will cost 30 or 35.
No, the Nintendo DS charger is different than the DS lite chager
A DS Lite Charger can be used to charge a Nintendo DS Lite. It's best to always fully charge the battery once it's empty. This will give a longer live to your battery.
you cant use the 3DS charger for the DS/DS Lite, but you can use the 3DS charger for the DSi and the same with the DSi charger, you can use it for the 3DS.
No it does not, you need to use your ds charger.
No, the DSi charger is different than the DS lite charger
Define always work. Everything will eventually wear out and break. The question posed is the same as will my DS always work. The answer there is no. Is your charger broken?
No, the Nintendo DS lite charger is not the same as the Nintendo DSi charger
No, though it can use a DSi or DSi XL's charger.