Kircuit Car Adapter for Insignia I-PD1020 I-PD720 Portable DVD Player Charger Power PSU

welcome back to educate to calm a name sub-skill your host today I'll be showing how to replace a lithium battery from this Filip DVD player this is a portable DVD player that runs on battery this alidium batteries you see I took it apart ready this is an old lithium battery I'm going to take it and apart and replace it with my leftover lithium battery that I got from other electronic parts now the important thing is to look at the voltage on these lithium battery this one is saying it's very faint because this is like 7 years old right that's why it's not you know not working after many use but you can see here it's a three point seven volt and then there's two of them right and they're connected in series how I can tell is we look at it carefully you have a positive terminal here it's connected to the red wire and then you have a negative terminal here how did I know that I use my unq