I have nearly alwys found that the original lithium battery which comes with my mobile phone or digital camera is better than any 3rd party lookalike.
My original Nokia battery significantly outperforms a lookalike even though the lookalike claims almost 40% extra capacity.
Similalry my digital camera's battery is better than the lookalikes I have tried.
Trouble is that original batteries cost a fortune to buy on their own.
Which are the brands for decent lookalike lithiums?
For example the NP-20 shown below.