You're mid-build, the PCB needs a 3V coin cell, and you don't want to be hunting through a parts bin at 9pm. This Jaycar CR-2430 is a solder-in lithium coin battery with pre-tinned terminals — flow your solder and you're connected. Full capacity in any orientation, so your board layout isn't the constraint. 3V, no surprises. $10.82 RRP. One cell, job done
| brand | Jaycar |
| cell_type | CR-2430 |
| chemistry | Lithium (coin) |
| voltage | 3V |
| mounting_type | PCB solder-in |
| terminals | Pre-tinned |
| orientation_constraint | Full capacity in any position |
