I need new batteries, i think.

[kevinmuff]

Thanks for all the info, its very helpful.
Im still just trying to get the nimh to charge for the time being, but if it is dead, that is fine.
I would like to get lipo if they are dead, but im not totally sure what needs to be done.
1. Yes ive got the charger.
2. Do i need to mod my plane somehow?
3. What other things would i need to do?

[kevinmuff]

Oh, and it seems to me that the charger will only let me set the cutoff voltage for the discharge at 0-20mv, not 1V.
What should i do?

[gagallagher04401]

1. you need a lipo compatable charger.
2. their is a black jumper on the ESC/RX on the stock cub electronics, that needs to be pulled out in order to use lipos in the plane. (search on this site many pics of it)
3. Read and search on lipos, safety, charging, etc....example when you charge lipos you charge them at 1C there capacity. example. a 3-cell 2200mah lipo battery would get charged at no more then 2.2Amps. A 1800mah battery would be 1.8Amps, 1500 would be 1.5 amps etc.. move the decimal point 3 places to the left and you have your charge rate.
Lipos seem hard at first, overwhelming and scary, they did to me anyway, but no bad at all, read and leanr, you will be fine, most of it is common sense.

[flydiver]

Any battery bigger than the box you need to mod the box. Plenty of info in that section.
You will likely need to change connectors. Choose a standard (NOT Tamiya), get some, and learn to solder.

You will need to pull this jumper to reset the low voltage cut-off to lipo:
supercubclub.proboards.com/index.cgi?board=ts&action=display&thread=988
Then....DO NOT TRUST IT!!!!! STOP FLYING BEFORE YOU HIT LVC OR START TO RUIN YOUR NEW LIPOS!!! Did I make that clear enough?

[the charger will only let me set the cutoff voltage for the discharge at 0-20mv, not 1V.
What should i do?]
Quit screwing with that setting. That's the TERMINATION setting for the charger to know when to STOP charging. Put it back to [default]. You can really mess up NiXX charging if you don't know what you are doing.
That is NOT the discharge stop voltage. That setting should be in the main NiMh setting flow. Read the (rotten) manual. ALL the manuals are rotten, get used to it.

Your charger is a clone. There are a BUNCH of these clones. Watch these and then follow links as you need. This is NOT a simple charger and NiMh charging is more difficult than lipo, it's just not as dangerous.

Watch ALL of these-you need it.

www.youtube.com/watch?v=okKhW2JouOI

www.youtube.com/watch?v=UDV3pmTZlfE&feature=related

www.youtube.com/watch?v=c8lNTKtf2vw

www.youtube.com/watch?v=KXo-cw7xxOI&feature=related

www.youtube.com/watch?v=6T4GVLsm4ls&feature=related