I am looking for a battery charger for AA batteries, without taking out the batteries from the board.

The board which is powered by AA batteries is : http://www.tagsense.com/images/stories/products/activetags/ZT-500-datasheet-short-form.pdf

I dont have any idea if I can charge the batteries just by employing the Vcc and Gnd pins I have on the board.

When the batteries are plugged into the board the total voltage at Vcc and Gnd pins is : 3V.

Could any one suggest for a battery charger which can charge the batteries without removing them from the board ..?? I am ready to build the circuit and if I can find already available charger it will be good.


  • \$\begingroup\$ If you use NiMH batteries (of course, they are rechargeable), but with 1.V terminal voltage (not 1.5V for alkaline batteries), you might be able to leverage this. PS> No personal experience with that circuit. \$\endgroup\$ – icarus74 May 9 '13 at 6:05

The data sheet you link to says (on page 6) that the battery is CR123 (not AA), which is a non-rechargeable lithium battery.

  • \$\begingroup\$ Yes I think there should be some error in the datasheet, but the Tag what I am using has 2 AA batteries \$\endgroup\$ – Sandesh May 9 '13 at 15:37

protected by W5VO May 9 '13 at 18:48

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