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9V battery size compared to a C and AA batteries

The size of a 9V battery compared against a common AA (double-A) and C battery.


Height 48.5 mm
Length 26.5 mm
Width 17.5 mm

The above dimensions are the maximum to be considered a classic 9V battery.


Voltage 9V, 8.4V
Chemistry Alkaline, Lithium, NiMH, Carbon Zinc
Capacity 175 – 1,200mAh
Rechargeable Yes, some

Replacement Sizes

1604A, 1604D, 1604LC, 6AM6, 6F22, 6LR61, 6LR61XWA, 9V, A1604, AL-9V, E522, EN22, K9V, LA522, MN1604, PC1604, PP3, U9VL

What are 9V Batteries?

The 9V (nine volt) battery is a rectangular dry cell classified by its 48.5mm x 26.5mm x 17.5mm dimensions and one-sided clasp terminals. They hold mid-range capacities upwards of 1,200mAh and were often used in radios, but today are used more for walkie-talkies, clocks, smoke detectors, and house alarms. Learn more about 9-volt batteries here.

Are there rechargeable 9V batteries?

Yes, rechargeable D batteries use NiMH (nickel-metal hydride) or LiPoly (lithium-polymer) chemistries and have an 8.4V voltage compared to the typical 9V of primary variants. A lower voltage may not affect your electronics' performance, but you should always check with your device's user manual to see if a battery voltage or chemistry is compatible.

Do 9V batteries expire?

Yes, all batteries eventually expire. 9V batteries have a range of shelf lives between 3 and 10 years, largely dependent on the battery's chemistry and storage conditions. We list the rated shelf life on all our product listings when available so you can make an informed choice when buying spares or bulk cells. For more information, check out our battery expiration guide!

Are all 9 volt batteries the same size?

No, but they all tend to be between 48mm x 25mm x 15mm and 48.5mm x 26.5mm x 17.5mm. A little bit of space can add a lot more energy capacity, but larger batteries may not fit all devices. We only carry reputable brands that fit industry standards, but you should check with your device's user manual.

Are there 9V battery chargers?

Yes, you can shop our selection of 9V chargers here. Do NOT attempt to charge primary, single-use batteries.

Do you offer bulk-pricing on 9V batteries?

Yes! A large selection of our batteries can be bought in bulk, letting you take advantage of huge discounts! You can filter our selection of batteries by bulk-eligibility, fill out a wholesale request form, or directly contact a member of our sales team now via phone or email!

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