I’ve purchased recently (aprox 45 days ago) a Duracell 600 Watt PowerPack Pro starter battery.
It has good reviews on Amazon, but most of those reviews are for an older model (Duracell 600 Watt PowerPack battery). I purchased this battery because it has a 600W inverter and therefore you can use it as a AC source (plug in regular devices there: computer, TV or small fridge).
The internal battery of PowerPack Pro model is 18AH. By comparison, the battery for the older PowerPack was 24AH (therefore 33% more capacity).
My battery didn’t last long. During the initial charge the battery took a long time to charge using AC power (more than 24 hours). I’ve used this battery only once to inflate my car’s tires and I was surprised to find recently that the battery doesn’t hold a charge anymore.
I’ve decided to open it and replace its internal lead-acid battery.
1. First step is to push by hand and take out the rubber protector corners
2. There are 4 screws on this side (3 are easy to see)
3. The 4th screw is hidden inside the upper compartment:
4. Flip the battery and find all 7 screws (2 are hidden in the holes below and other 2 are on top next to the handle)
5. Finally pry open the battery. I found some reistance next to the handle and I ended up breaking a plastic part there (not a big issue, but I’m not sure if that plastic was glued or I didn’t open the cover properly.
6. Disconnect the light cable connector
7. Set the power pack on its side and replace the lead-acid battery
The dimenssions of this lead battery are: 7 inch length, 3 inch width and 6.5 inch height.
Pay attention to the battery connectors (not all SLA battery with same dimenssions have similar connectors).
Replace the lead-acid battery and enjoy the repaired power pack.