Warmthru 3.7V Battery Pair

• 3.7 Lithium ion 3.7v batteries by Warmthru are purpose-built for some of our products, not all.
• Others use 7.4V.
• Warmthru 3.7v batteries have an on-off switch, but no heat control.
• Heat time and battery longevity vary according to the product because some have bigger draws than others. Generally speaking expect between 3-5 hours.

If you already purchased a Warmthru product that uses 3.7v batteries, then these will be spare batteries for you and you will already have a charger so no additional charger is required. This product is right for you.

If you haven't already purchased a warmthru product that uses 3.7v batteries, better do so now.