Mine has like at one end the little ridges that you press slightly down on and then you can slide the back cover off to get to the batts.
I'm curious to know how the battery is removed in order to charge it? Does the whole case open up or is there a battery cover? A picture of that side of the box would be helpful.
Oh, and gotta carry a small pocket knife with me in order to change the batts out. Tight fit and can not change out with just my short fat fingers. LOL!
Little hint if you use the edge of the slide off cover it will get the batt out easily
Okay I have all 510's you don't have adaptor 510>cartos or kreights or v4l lol
Also did you get more batts in?
901 and 510 box mods for sale. They have an on/off switch to keep from turning on in your pocket. They use 1 14500 3.7V battery, that last a long time and gives a more consistent hit longer than standard batteries. 901 box only no battery, charger, or atomizer $23 shipped in the US. 510 box, no battery, charger or atomizer $27 shipped in the US. Atomizers, batteries and chargers also available. PM me
No website. If you would like a mod just PM me. The 901 is $23 the 510 is $27. A 901 to 510 adapter is $7 (lets you use a 510 atomizer on a 901 box), 2 14500 protected batteries and a single charger $19, and atomizers are $7. All prices include shipping. The box has a 45 day warranty, if it malfunctions return it for a repair or replacement.
I have new boxes ready to be made. 901 to cartomizer (VK or KR808D) adapters $5. 901 to 510 atomizer adapter $6.