datwr said: How does that work, 2.5 hours playtime and 3 hours recharge? Is that even possible? Click to expand...

Because a lithium battery has a very specific charge cycle. The first 20% of charging is done quite slowly (low current). The next 70% is done quickly (high current). Then the last 10% is slowish again. There are plenty of articles out there that explain this. Now there are newer battery tech/charge solutions that use higher current for faster charging (Samsung is one). But it looks like Nintendo elected to not use one of these or they could not fit this charge solution on the PCB.