On Mon, 14 Dec 2015 17:18:42 +0000, Scott M wrote:

I see that LiIon and LiPo PP3s are now available with a capacity
comparable to alkaline ones. Anyone got a recommendation for makes and
suppliers, and a suitable charger?

Have look through broadcast/film related sites. Use of Li rechargable
PP3 size batteries in radio mics was something that was moderately
popular over the last few years. But advances in electronics and
DC-DC convertors has meant most kit has now migrated to a couple of
AAA or AA batteries...

--
Cheers
Dave.