Efest 21700 4000mAh 30A Rechargeable Battery
This IMR battery by EFest is a 21700 4000mah battery. It is rechargeable and has a flat top, both of which make it extremely versatile. These batteries work well with a multitude of vaping devices and box mods. They have a nominal voltage of 3.7V and a maximum charging current of 2.5V. This makes these batteries long lasting. Its discharge current is 30A and it has a temperature range of 0-103F degrees.
Specifications:
- Model: IMR
- Size: 21700
- Nominal Capacity:4000mah
- Nominal Voltage: 3.7V
- Maximum Charging Current: 2.5V
- Discharge Current: 30A
- Style: Flat Top
- Standard Charge: 2A
- Charging Temperature Range: 0-103F degrees
Cautions:
- Don’t touch conductive material (coins etc) to the positive end as this may short them and/or damage them.
- If the battery wraps are torn or damaged in any way the negative contacts may become exposed. This is dangerous, and the batteries should be discarded safely.
- Ensure that you are inserting the batteries the right way around.
- Always purchase your batteries from trusted vendors.
- Do not drop or mishandle batteries.
- Do not unpeel the wrap or puncture in any way.
- When transporting batteries put them in an appropriate container.
- Do not leave your batteries in extreme temperatures such as hot car or a very cold location.
- A good quality external charger will help maintain the integrity and life span of your batteries. A wise investment.
- If using an external charger, it is important that the voltage of your charger matches the battery voltage. For 21700 batteries you should only use a charger that provides a voltage of 4.2 (Efest Lush chargers work a treat and are available!). Any higher and your battery may short and vent.
- If your mod takes more than one battery make sure that they are “married”, essentially that they are charged together for the same length of time so neither have more power than the other.
- A low charging current (usually between 0.5 and 2.0 amps) is also important as charging batteries too quickly will degrade them, decreasing the number of charging cycles and possibly damaging the structure.
- Don’t exceed your amp limits.
- Dispose of damaged batteries appropriately (check with your local council).
- Keep batteries out of reach of children and pets.
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