Travel charger for Canon LP-E4N battery

[mackguyver]

I travel on a lot of and have always wondered why Canon did not make a one battery charger (even if only to buy as an accessory). I use more than one battery a day quite frequently, but would be more than happy with a one battery charger if they made one. As it is now, I just travel with the original.

No third party charger is ever going anywhere near my Canon batteries.

+1000

+1001 and I'm sure the reason Targus & co. aren't making any aftermarket accessories is because it's such a tiny market.  1D bodies make up such a small number of the overall sales that there's little incentive to create one. 

the 1-series dual battery charger is the size of a paperback novel.

I knew it was going to be big, but I was still shocked when I pulled it out of the box.  Damn that thing is huge.  It's definitely easier to bring 1 or 2 extra batteries instead of the charger.  I'm still debating on purchasing a second battery.  I'll probably wait until I have the need because my 5DIII will always serve as a back up.

[LookingThroughMyLens81]

Don't try a "universal charger" like the one they sell at "The Source".... I have a friend who got one for her SX-40.... and it didn't work.... I tried it on my LP-E6's.... and it didn't work... she gave it to anther friend with a Rebel and it didn't work... and the last person in our group had a Nikon p/s and it worked for her...

Moral of the story, universal chargers aren't....

Canon has changed the battery chips to make them incompatible with third-party chargers and third-party batteries won't work with the latest design of Canon chargers either. Nikon has done the same thing for the past several years. The only solution is multiple battery packs.

[RGF]

I can image a travel charger where the power supply is outside the charging unit - there are many wall (120/240V) to 12V power supplies.  The output side is a round/cylindrical plug.  Could be a common with a AA charger, ...

Attached to batter would be a much smaller unit - connection to the LP-E4(N) battery and a bit logic necessary.  The latter unit I suspect would be no larger than 1 x 1 x 2 inches.  If I knew enough electronics I would find an old charger and take it apart to see if this would be possible.