I just bought a Canon Powershot S90 and bought this battery at the same time as a spare. It starts to jam in the camera about 1/3 of the way in. A little wiggling with no force gets it another 1/3 of the way. That's it, it won't go any further.
After I realized the battery wasn't going to fit into my camera I compared it to the Canon battery in the Canon charger. The Canon battery has a slightly loose fit in the charger, this generic battery just barely fits.
Don't make my mistake. This is a cheap battery and I got what I payed for.
The Battery is fine, however Adorama had SKU# IBYNB6L listed as 1200mHA [in both the description and image] what was received was 1000mHA [17% less life per charge].While this battery is cheaper than Canon's battery, 1000mHA batteries can be found elsewhere for less. As I post this, the description is now listed as 1000mHA on the order page. In the section for writing the review the description is posted as "3.7 volt 1200Mah by Adorama". Maybe a typo, but the description matched the image of the POWER 2000 which can also be purchased elsewhere. The 1000mHA batter is an Adorama brand.
This battery works as well as the Canon-supplied battery. The header that has the electrical contacts is slightly skewed, but still functional. The Label started peeling back after the first insertion into the camera. I was able to tuck it under the edge of the header with my fingernail. All-in-all, it recharges and powers the camera well.
The battery won't charge. Have tried with several chargers but it just doesn't work. Bought it in the kit as I wanted to have a spare battery. Now I wish I had bought just the camera itself without this useless kit. It does fit in my Canon Powershot S95 though.