Never carry a loose battery! Always use a battery storage case!

Indy Vapor Shop provides a free battery storage case with every 18650 battery sold.

This is the Efest 3.7V 18650 Li-ion battery now with a 3400 mAh Capacity. One of the longest lasting 18650 batteries you can buy.

Protected and Unprotected available.

A "protected" Li-Ion has a small electronic circuit integrated into the cell packaging. It protects against common dangers, such as overcharge, over discharge, short-circuit (overcurrent), and temperature. These cells are safer to use, both individually and in batteries. They are less likely to ignite and cause personal or property damage, a phenomenon known as "venting with flame." Unprotected cells do not have this protection circuit, so they can have more capacity and current capability than protected cells. Some cells, such as 10440 (AAA), are too small to accommodate a protection circuit and are only available in unprotected form. Users must decide whether they prefer to stick with protected cells or accept the bigger responsibility and danger associated with unprotected cells.

Unprotected Specification:

Nominal Capacity 3400mA.  
Minimum Capacity 3400mAh.
Charging Voltage 4.2 ±0.05 V.
Nominal Voltage 3.6V.
Charging Method CC-CV (constant voltage with limited current).
Internal resistance: <50mÙ.
Lifetime: Charge and discharge more than 1000 times.
Max. Charge Current 3400mA.
Max. Discharge Current 5C.
Discharge Cut-off Voltage 3.0V.

 
Cell Weight: 50g.
Cell Dimension: 
         Height : 65.43mm max.
         Diameter : 18.47mm max.
Operating Temperature Charge : 0 to 45°C.
Discharge temperature: -20°C ~ +60°C.
Charge time: standard 3 hrs, fast 2.5 hrs.

Protected Specifications:

Voltage:  3.7V.
Cell Capacity:  3400mAh.
Top: Button top.
Protected:  Yes.

Dimension(mm):  69.75(L)x18.57(D).
Weight(g):  55g.
Material: Li-ion.

Important Note:
Never completely discharge li-ion battery ( below 2.7V under load ).
Charge fully to 4.2V before first use.
Never use force to install (insert) battery.
Do not use old and new battery cells together.
Use only a high quality battery charger.
Do not expose to heat.
Do not charge unattended.
Do not store your batteries fully charged (for extended period of time).
Store in cold and dry place at approximately 3.7V (storage charge).
After battery is discharged - don't leave it discharged. Charge it as soon as possible.

The following guidelines should be strictly followed:
1. Only recharge these devices with the intended charging cable or adapter. Using chargers with incorrect voltage or current can cause a fire or catastrophic failure.

2. Never leave a charging battery unattended.

3. Never charge a battery overnight while you sleep.

4. Never leave a battery on your charger longer than necessary. When it is full, unplug your charger and remove the battery. Leaving a battery on charge when it is full will degrade it’s performance and may result in a fire.

Indy Vapor Shop will not be held responsible or liable for any injury, damage, or defect, permanent or temporary that may be caused by the use of any battery. Please have a basic understanding of the batteries you are using and how to care for them properly.

Read the information found at: batteryuniversity.com before purchasing. It is important to carry batteries properly, recharge properly, and dispose properly.

Since we have no control over how a buyer uses the device; no guarantee, warranty, or return privilege will apply, unless the product does not function the first time used (DOA). We regret having to strictly enforce this policy. The use of DIY liquid, improper chargers, modified atomizers, and general abuse of the product has made it necessary.

Please do not order if you do not understand and accept these terms.