I really should rationalise my battery stock. I use:
Tiny cells In about 8 sizes. For refuelling watches
Tiny NiMH The light that lives plugged into the car's cigar lighter socket.
LR44 Various no-name lights
CR2016 All those Photon 2 clone lights that cost next to nothing. I get through about 150 a year - almost all given away
CR2032 Computers, other stuff. The fake candles at work (There are smoke detectors everywhere so can't use real candles, it costs £2K for each false alarm)
CR2 An old ultrafire WF-606A with a Luxeon emitter. Way brighter on CR2 than on 2xAA
RCR2 Orb Raw x2. I Luxeon, 1 Cree XR-E. Time for an LED swap in both since the Cree is something like a P2. The other is a Luxeon 3 T-bin. It cost a lot.
RCR123 I don't own a single light that needs primaries other than the Nuwai 5W but it runs nicely on 2x17500 instead. Too many to list on RCR123.
10440 Various. At least 3 lights
AAA remote controls
AAA NiMH Various, Label printer which uses 6 of them
AA Pager, clocks, remote controls
AA NiMH Lots of lights
14500 Various - all of them torches
17500 A Luxeon V Nuwai light
C A Streamlight TwinTask 3C clone
C NiMH An Elektrolumens device with 3xK2 (old style) emitters. The most expensive light I own.
D Nothing that I can think of
D NiMH 2xMaglite 6D - both with ROP bulbs, metal reflectors etc.
32600 ROP High bulb in a 2D Maglite, metal reflector, shortened spring, resistance fixes etc - about 1100 lumens for over an hour
17670 Golston, Fenix P3D, Romisen RC-F4
18650 Rather a lot of lights- most of them Surefire 6P clones of one sort or another. All of them Ultrafire branded.
Sub C A mod to a lantern - currently broken - a 5W LED from a no-name manufacturer run from a 7.2V Sub-C battery pack
2/3Sub C An old Nuwai 1W light. Nice light if a bit dim by today's standards. Tossed the Luxeon LED years ago and replaced it with a Seoul P4. Currently not working. Suspect fried driver board
6V SLA A "blah million candlepower" spotlight - currently not working till I rewire it. Pulls about 200W from the batteries which don't last for long. 12 minutes runtime on high - 20 minutes on low - when it is working. A Sun RAID array attached to the world's loudest server. You wouldn't hear a lawn mower beside this thing.
Time to rationalise I think. I have stock of all the cells/batteries here.
Which is why i own so many chargers.
The numbers from my light tests are always to be found here.