Index / Shells / 26.5 x 17.5 x 48.5 mm
26.5 x 17.5 x 48.5 mm
3 designations carry this exact envelope and they disagree on voltage: 7.2H5 runs 7.2 V where 6LR61 runs 9 V, 20.0% apart. The compartment cannot tell them apart and the circuit can. Capacity is where they part: 7.2H5 holds 150 mAh and 6LR61 holds 565, 3.8 times as much. On a shop shelf this envelope is the 9V size, and that name is what the packet will say.
Every cell in this shell at one scale
| Cell | Envelope | Volts | Chemistry | Energizer |
|---|---|---|---|---|
| 6LF22 | 26.5 x 17.5 x 48.5 mm | 9 V | alkaline | Listed |
| 6LR61 | 26.5 x 17.5 x 48.5 mm | 9 V | alkaline | Listed |
| 7.2H5 | 26.5 x 17.5 x 48.5 mm | 7.2 V | nickel-metal hydride | Listed |
Also stamped on cells in this table: 6LF22, 1604A, 522, 522 ALKALINE POWER, EN22, A522, 6LR61, A522V, X22, EP522, 7.2H5, NH22-150MAH, NH22-175MAH.