Does it ever happened that you desperately need a battery (or few) and the only ones you have are of a different measure ?
Well, as long as the one you need is bigger than the ones you have, here is a little customizer to build your adaptors.
To extend the contact areas you can use different things...aluminum paper, a piece of metal, a screw, a spring, a piece of metal wire, or little magnets.
I have these little 1.5mmx5mm magnets that I just put on the + pole and the extension is done, add the sleeve and you have the battery you need...
Radius_1 is the diameter of the battery you need, Radius_2 is the diameter of the battery you have, same for heights.
The top hole too can be the size you like.
The measure for Height you enter is the total one, from bottom to the top of the positive pole; in the customizer is calculated a 1mm top clearance for the + side.
The only thing you should consider is to add about 0.15mm for the inner battery and the pole hole diameters.
Measures are tipically as follow:
Type=diameter x height
AAAA = 8.3 x 42.5mm
AAA = 10.5 x 44.5mm
AA = 14.5 x 50.5mm
A = 17 x 50mm
B = 21.5 x 60mm
C = 26.2 x 50mm
D = 34.2 x 61.5mm
4 x Duracell AAA Rechargeable Batteries 850 mAh DX2400 Authentic 41333661605 | eBay
New SONY AAA Batteries Cycle Energy Gold Rechargeable NH-AAA-4BKB Japan 4901660135407 | eBay
Energizer AAA Rechargeable Batteries 4 Pack, 2 Count = 8 Batteries 39800028808 | eBay
Panasonic ENELOOP 4 AAA Rechargeable Batteries 800 mAh Pre-Charged 4th GEN | eBay
Energizer AAA Rechargeable Batteries 4 Pack, 4 Count = 16 Batteries | eBay
I created these links where you can find all common filaments and spare parts at the best prices. These are just links to selected eBay and Aliexpress items, where I normally buy spare parts and materials for my printer, prices are excellent and products are good. If you buy something from here you will support me a little bit to make these projects.
1Kg PLA Filament - eBay
1Kg ABS Filament - eBay
1Kg TPU Filament - eBay
1Kg PET Filament - eBay
Complete extruders - eBay
Heat blocks and heaters - Aliexpress
Standard nozzles - eBay - Standard nozzles Aliexpress
Volcano nozzles - eBay - Volcano nozzles - Aliexpress
GT2 pulleys - eBay - GT2 pulleys - Aliexpress
GT2 belts - eBay - GT2 belts - Aliexpress
Linear bearings LM series - eBay - Linear bearings LM series - Aliexpress
NEMA 17 step motors - eBay - NEMA 17 step motors - Aliexpress
3d pen - eBay
100$-200$ 3D printers - eBay - 100$-200$ 3D printers - Aliexpress
200$-300$ 3D printers - eBay - 200$-300$ 3D printers - Aliexpress
300$-500$ 3D printers - eBay - 300$-500$ 3D printers - Aliexpress
500$-1000$ 3D printers - eBay - 500$-1000$ 3D printers - Aliexpress
1000$-2000$ 3D printers - eBay - 1000$-2000$ 3D printers - Aliexpress
2000$ - 5000$ 3D printers - eBay - 2000$-5000$ 3D printers - Aliexpress
Filament extruding machine - eBay -
Filament extruding machine - Aliexpress
Pellets for extruding machine