Canon CBK4-300 Rechargeable Battery & Charger Kit

It's really expensive to maintain gadgets like cameras you always have to change batteries, upgrade storage and some other things. My fourth set of rechargeable batteries are now showing signs of wearing out again and as always I need to buy another set because I want one that will last from dawn to evening if ever I need it.  

I'm  using Canon PowerShot Camera so I browse for the same brand of batteries.  I'm assuming that it will be a better alternative than other brands. I've found Canon CBK4-300 Rechargeable Battery and Charger Kit for PowerShot Cameras which is more expensive than my previous sets but I like it especially that it's now USD39.99 from previous price of USD58.00. It's available at amazon.com.