If you are looking for more info on Canon NB4-300 Battery Pack for the S5 IS, S3 IS, S2 IS, S1 IS, and PowerShot A Series Cameras – you have come to the right place
- Pack of four rechargeable AA-size batteries
- Nickel Metal-Hydride technology free of memory effect
- Compatible with any digital camera that uses AA batteries
- 2500 mAh capacity rating
- Can be recharged approximately 300 times
CANON NI-MH BATTERY PAKThis four-pack of NiMH rechargeable AA-size batteries can be used with any digital camera or electronic device that is powered by NiMH AA batteries. They’re rated with a 2500mAh capacity and can be recharged approximately 300 times.
Review by NLee the Engineer for Canon NB4-300 Battery Pack for the S5 IS, S3 IS, S2 IS, S1 IS, and PowerShot A Series Cameras
Rating: 
I usually stay with Canon accessories for my Canon cameras, just for the ‘peace of mind’ I can expect from the same manufacturer. But in this case, I see no reasons to choose this item (Canon NB4-300 Battery Pack) just because of the brand name. Consider the following facts:
1. Canon is not a battery manufacturer. So those 2500mAh rechargeable NiMH cells are simply re-labeled from other vendors.
2. All 2500mA NiMH cells in the market are plagued by the problem of high self-discharge rate. That is, if you charge up a set of those AA cells and leave them in your camera for a few weeks, they may become completely drained before you can take any pictures.
For the price of this Canon battery pack, you can buy eight of the latest generation LSD (low-self-discharge) cells such as SANYO eneloop, Rayovac Hybrid, or Kodak Pre-Charged.. Even though their stated capacities appear lower at 2000-2100mAh, those cells can hold 80% of their charge for 6 months or longer. So you don’t always have to recharge your camera’s batteries the night before, and you can keep another set of charged batteries as standby. This makes LSD cells much more suitable for digital camera applications.
Personally, I have retired all of my old-genreation (2500mAh) NiMH cells, and am using only LSD cells in photo equipment now.
Review by Gary D. Townsend for Canon NB4-300 Battery Pack for the S5 IS, S3 IS, S2 IS, S1 IS, and PowerShot A Series Cameras
Rating: 
I bought two sets of these so that I would have a backup set to put into my Canon S3 IS when the first set ran dry. Last year, on a trip to Portugal, Spain, and London, I was quite pleased at how long these batteries lasted before having to install the replacement set. I was able to take the majority of 500+ photographs using just one set, fully charged.
Review by JR Fent for Canon NB4-300 Battery Pack for the S5 IS, S3 IS, S2 IS, S1 IS, and PowerShot A Series Cameras
Rating:
I’ve bought NiMH (nicknamed Nim-Hah’s) from Canon, Energizer, Radio Shack, & RayoVac. We use them in exactly the same way and with the same load everytime. So it’s easy for us to tell which gives us the best performance.
How we use them: dozens of flash pictures in a Canon digital camera
Results:
The Canon batteries can recharge the flash diode 30-50% faster than the other brands we tried.
The Canon batteries give us double or more snapshots before having to replace.
Final Note: Some critiques will say that they can’t see the difference in value for the higher price. I would say “bull”. faster flash warmup and less battery chnges are worth the difference.
JR Fent
IT Recruiter
jrfent.com
Rating: (out of 13 reviews)
List Price: $ 24.00
Price: Our $ 15.95
Review by Tim Ooten for Canon NB4-300 Battery Pack for the S5 IS, S3 IS, S2 IS, S1 IS, and PowerShot A Series Cameras
Rating:
I have the PowerShot S3 IS, and with the camera I bought two sets of these batteries. I took approximately 500 pics with the camera’s settings on low before I had to change the batteries. I also had a set of the Energizer rechargables, but they have less than half the working-life that these Canon batteries have. I’ve given the Energizers to my son for his GameBoy, and I will never again have any other batteries with this camera other than these batteries.