Posted by a reviewer on Amazon

Including the specialized driver for disassembling the razor was a great ideaive got a lot of tools but nothing that would have worked to open the case

Posted by a reviewer on Amazon

I was not able to solder these in as the directions directed

Posted by a reviewer on Amazon

So instead i folded the solder tabs back and forth twice into a fan fold effectively making a spring connector out of the tabs

Posted by a reviewer on Amazon

I didnt have my soldering gun with me but i cut the old battery out leaving as much of the old metal ribbon contacts in place

Posted by a reviewer on Amazon

Then i crimped on the new contacts onto the old ones like an accordian and shoved in the battery

Posted by a reviewer on Amazon

After the first full charge the razor lasted two full weeks

Posted by a reviewer on Amazon

I had to completely remove the card from the razor and then desolder the tabs from the original batteries

Posted by a reviewer on Amazon

So this is not for the soldering novice