As time goes buy your Nitelite Storage batteries will no longer be able to be recharged...Don't ever throw away your battery after this occurs..You can visit battery stores in Pa such as (Batteries Plus)...They sale a replacement battery that you can install inside the case real easy... Take your burned out battery inside the case with you to the store so they can match it up...
Batteries like the older Wizard (Two Prong) can not even be purchased from Nitelite... So save the old battery and you can continue to use the outdated battery combo packages you purchased..
Also if you go to a outdoor fleamarket and see your battery type on the table buy it even if it does not work...Of course make sure you get a good deal on it since the innards have probably have seen their days.....