Pros: Great battery..can use phone all day
I knew about this type of battery since I had a similar one for my BB8320. This battery significantly extends the working time of my phone which is what I wanted. It charges well and even with everything on, I can use the phone all day before charging again.
I can now use the BB 9900 as my main phone
User: Stephane Landier, Sep 26, 2012
Before this, the BB9900 was a nice gadget, but absolutely unusable as my main phone because of the appalling battery life (the 9790 being a tad slower and smaller, but providing the necessary juice).
With this Jumbo Battery, I can now last almost 2 days on 1 charge on the 9900 (whereas before I could not last of full day of intensive use).
Go for it if you have a BB9900 and are upset about the battery life!
User: A Robinson, Aug 22, 2012
Pros: Long life,
Cons: loss of NFC, weight, thickness
Im a business professional on the go and my battery would only last 1/2 day which was very annoying. Now I am no longer have to worry about my car charger or wall charger for short trips. This batter allows me to have 3-4 days without charging. I use a lot of data, mobile hotspot and conference calls (which seem to never end).
I would definitely recommend this! Worth the weight, size and loss of NFC..RIM hasnt really developed much for the NFC function yet.