Bests & Worsts Reviews from Amazon

Much lower capacity than the original batteries, which is quite disappointing as they don't just claim to match the original batteries, but claim to be 30% more capacity. The first giveaway is that the battery weighs less: Sony OEM NP-BX1: 24.6g Wasabi 1st battery: 20.9g Wasabi 2nd battery: 20.6g I have a battery tester that will measure the capacity of batteries (first you fully charge the battery, then connect it to the tester, and it runs them down and measures how much output they give before dropping below a set voltage, I discharged the batteries at 1A, with cutoff voltage set at 3.0V. Setting a lower discharge rate or lower cutoff voltage would allow to squeeze a bit more power out of the batteries, but take much longer. As long as I used the same settings on all batteries, they can be compared directly against each other) Sony OEM NP-BX1: 1180 mAh (95% of rated 1240mAh) Wasabi 1st battery: 840 mAh (53% of rated 1600mAh) Wasaby 2nd battery: 835 mAh (52% of rated 1600mAh) So even though these batteries claim to be 30% bigger than the original batteries, they are actually 30% smaller! There should be a law against this sort of thing but unfortunately almost every 3rd party battery supplier lies about their capacity from what I've seen. In terms of price per capacity, these are still a way better deal than the original batteries (2 batteries and a charger for $18 vs one battery for $30), but just be aware they wont last as long so you will need to carry more of them around.