Default [Q] Unable to charge battery Windows Phone 7.8 w/ question mark icon.

I have a Unlocked AT&T Samsung focus flash with WP 7.8.
I recently ordered a replacement battery.
I was unable to find the exact model online and settled for a 1350 mAh battery, the old one was 1500 mAh.
I am able to get the phone to boot and work with this battery, however it refuses to charge.
and as soon as I plug-in the charger, the battery indicator shows the question mark icon.
I am able to charge the battery with another Samsung phone(android), even that phone also has a higher capacity battery (1650 mAh).
Is there any registry I can edit for my phone to understand this battery.