#1. "RE: D3000 batteries querry" In response to Reply # 0 Thu 22-Nov-12 06:24 PM by MEMcD
Welcome to Nikonians! No! The MH-23 Charger supports both the EN-EL9 and the EN-EL9a. See page 190 of the D3000 Users Manual (If you didn't get a hard copy, check the CD that came with the camera). The D3000 Only supports the EN-EL9a. Good Luck and Enjoy your Nikons!
#3. "RE: D3000 batteries querry" In response to Reply # 1
Farmington Hills, US
p. 190 only says that the charger will work with the EN-EL9 and EN-EL9a.
p. 189 only shows that the camera battery is the EN-EL9a.
My guess is that the D40 will work with both batteries but the D3000 will only work with the EN-EL9a. Often the batteries with the suffix contain a chip that is used by the camera to help monitor the charge. If he EN-EL9 fits it the battery chamber it may work in the D3000. It's possible that the EN-EL9 will not fit in the camera, don't force it if it doesn't go in easily.
Gary in SE Michigan, USA. Co-organizer of the Southern Michigan Chapter Nikonians membership - My most important photographic investment, after the camera. D4, D810, D300, D90, F6, FM3a (black), FM2n (chrome) YashicaMat 124, Graflex Speed Graphic 4x5 My Nikonians Gallery & Our Chapter Gallery