What is the charging voltage of 3.7V lithium battery?

3.7V lithium battery

The 3.7v lithium battery is a lithium battery with a nominal voltage of 3.7v and a full-charge voltage of 4.2v. Its capacity ranges from several hundred to several thousand mAh. It is generally used in various instruments and meters, testing instruments, medical instruments, POS machines, notebook computers, and other products.

About the capacity of 3.7V lithium battery capacity, the larger the volume of a single lithium battery, the greater the capacity, or we can say that the more the number of lithium batteries in parallel, the greater the capacity.

Generally, a 3.7v lithium battery needs a “protection board” for over-charging&discharging. The battery without a protection board can only be charged with 4.2V voltage, because the ideal full charge voltage of a lithium battery is 4.2v, once the voltage exceeds 4.2v, the battery may be damaged. Charging in this way requires someone to monitor the condition of the battery at all times.

On the contrary, the battery with a protection board can be charged with 5V (range from 4.8V to 5.2V). As we know, in most cases, a 5V charger can be used for USB of computers and mobile phones.

The charging cut-off voltage of the 3.7V battery is 4.2V and the discharge cut-off voltage is 3.0V.  Therefore, when the open-circuit voltage of the battery is lower than 3.6V, it should be able to charge. It is better to use the 4.2V constant voltage charging mode, so you don’t need to pay attention to the charging time. If 5V charging is used, overcharging is easy to happen.

1. GREPOW 3.7V Micro Rechargeable Lithium battery

GREPOW Battery provides a rechargeable micro lithium battery series for wearable applications in 2019. The smallest dimensions with a diameter of 4.5mm to 12mm and a thickness of 4mm to 23mm. The high energy density and higher working voltage meet 3.8V so that the capacity meets 18mAh to 65mAh in limited space.
In addition, the semi-micro lithium battery pack is also available for this battery series. Some cells are in series to meet 7.4V, 11.1V, or more and keep the same diameter. Some cells are in parallel to meet higher and higher capacity.
It’s the best power solution for small applications such as a headset, IoT, GPS, medical, cordless sensors, Bluetooth headset, Smart toys, Smart-watches, and electronic bracelets… because of lower self-discharge current & longer standby time.e.

 rechargeable button cell batteries

2. 18650 3.7V Rechargeable Battery

18650 batteries are most commonly used in rechargeable flashlights, cameras, LED clocks, and portable speakers and fans. They’re also used to build battery packs and power banks such as those found in laptops. The 18650 names are based on their nominal size of 18 mm diameter by 65 mm length.

Technical Specs

  • Battery Size: 18650
  • Item: Rechargeable Battery
  • Battery Chemistry:Lithium Ion
  • Voltage – Batteries 3.7V DC
  • Recharge Time 5 to 6 hr
  • Capacity – Batteries 2,600 mAh
  • Shelf Life 3 yr
  • Rechargeable Up To1000 Times
  • Precharged Yes
  • Max. Operating Temp. 122 Degrees F
  • Min. Operating Temp. -4 Degrees F
  • Standard Battery Pack Size 1
  • standards (EMC test)
  • Diameter 0.75 in
  • Height 2.75 in
  • Overall Height 2.75 in

3.3. Grepow 3.7V lithium battery List

For a more extended working time request, the more and more current smartphones & tablets are built-in high voltage 3.8V li-polymer battery. We improve our battery manufacturing technology and select high-quality devices for providing more top power li-polymer battery solutions for customer’s demands. The high voltage 3.8V li-polymer battery has more than 10%-15% capacity than the general 3.6V & 3.7 li-polymer battery. The fully charged voltage is up to 4.35V, and the cut-off voltage is 3.00V. It’s a better solution for increasing the power in the limited space.

Grepow shaped 3.7V lithium batteries

Manufacturer Voltage Capacity Shaped Type Model
Grepow 3.7V 220mAh Rectangle Lipo Battery GRP4812050
Grepow 3.7V 120mAh Irregular Hexagon Lipo Battery GRP4022020
Grepow 3.7V 22mAh ultra-thin Lipo Battery GRP0422055
Grepow 3.7V 90mAh Curve Lipo Battery GRP3113031
Grepow 3.7V 225mAh Curve Lipo Battery GRP4017040
Grepow 3.7V 200mAh Rectangle Lipo Battery GRP5811047
Grepow 3.7V 220mAh Rectangle Lipo Battery GRP6011047
Grepow 3.7V 66mAh Button-Cell Lipo Battery GRP1254
Grepow 3.7V 250mAh Rectangle Lipo Battery GRP5212050
Grepow 3.7V 40mAh Curve Lipo Battery GRP2508030
Grepow 3.7V 450mAh Rectangle Lipo Battery GRP6824037
Grepow 3.7V 85mAh Curve Lipo Battery GRP3512029
Grepow 3.7V 22mAh Rectangle Lipo Battery GRP2010021
Grepow 3.7V 37mAh Rectangle Lipo Battery GRP3013020
Grepow 3.7V 100mAh Round Lipo Battery GRP5516015
Grepow 3.7V 125mAh Round Lipo Battery GRP5521020
Grepow 3.7V 135mAh Round Lipo Battery GRP2530027
Grepow 3.7V 1500mAh Round Lipo Battery GRP7550040
Grepow 3.7V 170mAh Round Lipo Battery GRP3030027
Grepow 3.7V 210mAh Round Lipo Battery GRP2537036
Grepow 3.7V 225mAh Round Lipo Battery GRP3630027
Grepow 3.7V 835mAh Irregular Round Lipo Battery GRP7042030
Grepow 3.7V 300mAh Round Lipo Battery GRP5030027

If you would like to know more about batteries please contact us at info@grepow.com

Website: www.grepow.com

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