You need to lift or pry it up off of the circuit board. Then there is hardly any wire length to work with and the connection doesn’t slide off parallel to the circuit board as it might appear. Of course, pulling the battery is a pain because it's glued down (work a credit card under so you don’t pierce it). I bought an old one from eBay to swap batteries. Eventually, the battery became pretty much useless and it would constantly reboot whenever it was unplugged. Mine swelled so much that the back popped completely off and wouldn’t stay closed except with rubber bands. Probably best to use a power timer that only charges it occasionally. These things seem to be very sensitive to over charging. Remove the charger, turn it on and your good to go. Plug it into the charger with the unit off until it charges to 100%. It probably there for a reason like preventing shorts or something. I put the felt cover back on the covered screw. Turn it on to make sure it’s working, turn it back off, then put the screws back in. Then put the new battery in guide the plug & wires through the hole, line up the connector red wire top and press down on the plug and it will pop into place. The bottom of the plug/connector is slotted so it pops off. Once that is off you’ll see the plug with the 3 wires Red top green middle black bottom. Once that one is out carefully separate front panel it clicks in & out just like the back cover.

There is 1 more screw that has a felt like cover over it. Then I used a small philips screw driver to remove the 4 visible screws. Then I used a full sized (wallet sized) plastic card. I worked it under each corner then worked inward until I had it pretty well loosened. Started with a thin plastic Key Chain card (those small membership cards like Rite Aid etc.) it’s small and you can maneuver it around. I turned it off, removed the SIM card & tray. Then I turned it on and connected to it That was 3pm, it’s 9:26pm now and it’s only 1/2 way drained 2 of 4 bars left. I left it turned off until the battery charged. I changed mine today with a normal hard case battery with the same exact specifications.

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