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Armband Size Guide

Upper arm circumference

How to Measure

1Wrap a flexible tape measure around your upper arm
2Measure at the fullest part (mid-bicep)
3Note in inches or centimeters

Size chart

Size	Inches	cm
Standard Armband	8.5″ – 15.5″	21.5 – 39 cm
Extra-Long Armband	12.5″ – 18.5″	31.5 – 47 cm

Both armbands fit most body types.
Additional bra extenders can be purchased at any store if larger sizing is required.

Is the battery replaceable? How long will it last?

By Tempdrop team

Updated April 29, 2026

Tempdrop uses a standard, inexpensive 3V Lithium coin cell battery - CR2032. You will receive a notification through the Tempdrop app when it runs low.

The easily replaceable battery life average is...

Tempdrop 2.0 advanced model: 12-15 months
Tempdrop original model: 4-6 months

The step-by-step battery change guide can be found in the Tempdrop app menu.

Is the battery replaceable? How long will it last?

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