Great dual EN EL 15 charger

[Pistnbroke]

found this great dual charger for less than $10    USB powered so use in anywhere /in the car/ on holiday  .So much better than the standard one which you cannot stack and has the slow flashing light ...Also similar for EN EL 14 and sony.  Just poke ebay
http://www.ebay.co.uk/itm/EN-EL15-Battery-Charger-for-Nikon-D7000-D800-D7100-/381872895707?hash=item58e965f6db:g:lG8AAOSwnHZYQzV7

[Bjørn Rørslett]

Cheap is not synonymous with 'good' or 'better than original' ...

My experiences with third-party or non-matching chargers are mixed and most are bad. Minor updates in Nikon battery technology (typically signified  by an 'a' suffix to the battery type) may require a new original charger (MH-25 > MH-25a in case of the D500 batteries) in order for charging to be optimal. Same with using the EN-EL4a in combination with the D2H/D2x chargers; they don't do the newer batteries full service and the charger for D3/d3S is required.

[Pistnbroke]

True ..you also have the logic that they are crude chargers ..ie apply 8.4v to the two pins they have not the  5 pins on the Nikon unit...Charging the two cells in series to 8,4v and signalling charged when current drops,  Not sure if Nikon charger is charging them individually or if the 5 pins are for battery life recognition ie  two cells out of balance .
Seems to be well made however .

[Bjørn Rørslett]

The Nikon charger serialises charging, so each battery is done individually.