BP-HP550-11 Replacement Battery for Sony BP-HP550-11 Headphone Battery (700mAh, 2.4V, Ni-MH)

hey gang making this video because I couldn't find an answer to what I was trying to do on YouTube myself figured it out myself and thought I would share it with you went to play with my little remote-controlled car that I haven't played with and I don't know a couple years and found out that the battery was completely dead it wouldn't even take a charge from the charger that came with it which is got fresh batteries in it you just plug it in so I used to work in the cell phone field and back in the day with the nickel metal hydride batteries and the nickel cadmium batteries I learned that by giving a battery a little bit of a overcharged you can sometimes jumpstart it and get it to take a charge again so that's exactly what I set out to do I found this AC adapter or AC to DC adapter that has a selectable voltage on it and that actually had multiple tips but what I used here was the 9-v