9V battery size
26.5 × 17.5 × 48.5 mm
9 V · Alkaline · Rectangular · also sold as 6LR61, PP3, MN1604, E-Block
About the 9V
The rectangular block in smoke alarms and guitar pedals. The "6" in 6LR61 is the giveaway: it is six 1.5 V cells stacked in series, and in most brands those cells are AAAA size. Capacity is low — around 500 mAh — so it suits alarms that draw almost nothing and struggles with anything that does.
The numbers
| Length | 26.5 mm · 1.04 in |
| Width | 17.5 mm · 0.69 in |
| Height | 48.5 mm · 1.91 in |
| Nominal voltage | 9 V |
| Chemistry | Alkaline |
| Other names | 6LR61, PP3, MN1604, E-Block |
Other rectangular sizes
| Cell | Size | Voltage |
|---|
Frequently asked questions
What size is a 9V battery?
26.5 × 17.5 × 48.5 mm.
What voltage is a 9V?
9 V (Alkaline).
What is another name for a 9V?
6LR61, PP3, MN1604, E-Block — all the same cell.
Is the 9V rechargeable?
Not in this chemistry. Alkaline cells of this size are single-use; recharging one is a fire risk rather than a saving.