Winter is coming and it is time to get the annual Battery / Battery Charger discussion going.
I ran across this ad for a new (to me) battery type. It is a Lithium Nickel Manganese Cobalt Oxide (LiNiMnCoO2) chemistry and the Ah rating the mfg claims is phenomenal.
Has anybody seen or even used this type already?

http://www.millenair.nl/shop/batteri....4v-20.5ah-nmc

Uli
'AS'