Even while the current technology of rechargeable batteries they sometimes burn out. This usually takes a long time. It is quite rare for the batteries to have any serious flaws in them. It sure beets normal batteries though, having to replace them after every single use. It fills up landfills and increase emissions, so it is best to stick with rechargeable batteries. However, sometimes it is just impossible to find a replacement for the rechargeable battery you need. Luckily, there are a few things you can do.
The first step I would take immediately is to search for a rechargeable lantern battery on the internet. The internet is a huge place where virtually any product can be found if you search in the right place. Be sure and look around a lot and read the descriptions carefully. Even if it doesn't list your specific model you may be able to use other kinds of batteries of the same size and voltage- however you can never be too safe. It is very important that you find the specific kind of battery your lantern or other electronic device requires.
The second thing you can do is try and contact the manufacturer. If the battery has simply burned out, this can happen after 500-1000 charges, they might have a store online or a mail order number for you to call and have them replace it. Unfortunately this will probably cost you a little bit of money, but it still definitely beets having to buy thousands of conventional AA batteries through its lifetime. If you think that it was defective then the warranty might cover it. You can read the warranty instructions carefully and follow what it says or try and contact the manufactures warranty line. Most companies want all of their products in the field to be top quality and will work hard to make sure you get a battery that works just fine.
