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Choosing the right 3.7V batteries is crucial for the performance and longevity of your electronic devices. Whether powering a portable speaker, a vape mod, or a DIY project, the battery's quality directly impacts reliability and safety. Understanding key specifications ensures you select cells that meet your device's demands and provide consistent power.
【Size Parameters】3.7V 3200mAh lithium batteries, size: 18mm(0.7 inch) diameter x 70mm(2.7 inch), (Note: they are longer than the flat-top batteries, please check the battery size before purchasing)
【Superior Performance】：Built-in USB-C port, support C-C output, you can charge your cell phone and other devices in case of emergency, easy to charge with the included 2-in-1 USB cable, no need for an additional battery charger (does not support PD...
【Widely Uses】：NERMK 3.7V rechargeable batteries are suitable for flashlights（High-power flashlights are not suitable）, headlamps, remote controls, microphones, radios, bike lights, bluetooth speakers, and other household devices.
【Safe and Efficient】: NERMAK 3.7V battery has built-in safety protection against overcharging, over-discharging, over-current and short-circuit, with 1500+ charging cycles for longer service life, making it an ideal replacement battery for...
【Warm Note】: 2* 3.7 Volt Replacement lithium ion battery，12 months warranty, If you have any question for our product, Contact us: click the "Ask a question" on our storefront or in "YOUR ORDER" options click the "contact seller"
【Package Included】- 1 Pack 2-Bay 3.7 USB Battery Charger and 2 Pack Ni-MH Rechargeable Batteries (Material: Ni-MH; Type: Button Top; Capacity: 2200mAh, Size: 18.01mm * 18.01mm * 67.01mm / 0.7inch * 0.7inch * 2.63inch(L*W*H)). NOTES: These are Button...
【Temperature Protection】- Stop charging automatically if the temperature of charger or battery gets too high when charging. Stainless steel rail is more long-lasting and smooth. Worldwide voltage, suitable for the whole world, car adapter is...
【LCD Display】- High definition LCD displays real time charging status, 4 sets(25%-50%-75%-100%) of LED indicators show independently when charging, making the charging process visible status and stopping once completing charge intelligently
【Durable Design】- The battery has new internal structure, subvert the traditional battery structure, the bottom insulation ring prevents short circuit, adopts full inspection secondary explosion-proof design.
【MULTI USE ＆ LONG CYCLES for Battery】 - 2200mAh batteries Ni-MH can be recharged for long cycels, and compatible with LED flashlights, emergency lights, portable devices, headlamps, toys, remote controls, doorbells solar lights, racing, game...
Compatible with LED flashlights, headlamp, toys, doorbells, cameras, small fans, RC car headlights, solar lights, racing, game controller, emergency lights, portable devices, remote controls and other electronic devices.
Real capacity is 500mAh-800mAh, 3.7 volt lithium battery connector plug: SM-2P black 2 pin, plug end cross-section size:5.5*5.2mm/ 0.22*0.195inch, 1S li-ion battery fit for some small size Stunt RC Car and some kind 1/18 scale RC Cars. 3.7V 500mAh...
USB cable built-in over-charged protection board, it would stop after full charged, some red light are not off after full charged, you can reconnect again,red light would be off if full charged. It most take 3-4 hours can full charged.. 3.7v rechargeable...
There is 8.5A over current protection circuit on this battery. 3.7V 500mAh Li-ion battery replacment for Small Size RC Cars RC Boat RC Trucks , battery replacement for some kind Small Amphibious RC Stunt car. 3.7V 500mAh battery fit for some kind...
3.7V 500mAh-800mAh Li-ion batteryr replacement for some small size Drift RC Car. Battery replacement for some version DEERC DE70 DE42 DE45 DE68 DE69 Remote control Cars, battery replacement for some old version BEZGAR TD141 ransform RC Cars, battery...
3.7V 500mAh-800mAh Li-ion rechargeable battery replacement for some kind of Small size RC Boat,which use same plug and voltage. Battery replacement for some kind 2 IN 1 Small RC Boat, Battery replacement for some Wave Speeder Small size RC Boat, Battery...
3.7V 500mAh-800mAh Battery suitable for some kind 360° Stunt RC Car. 3.7V 500mAh Battery suitable for some kind remote control stunt car, 3.7V mAh Li-ion battery suitable for Threeking Double-sided RC Stunt Cars, which battery size, voltage and plug all...
3.7V 500mAh-800mAh Battery suitable for some small senstor Transform Stunt Car. 3.7V 500mAh battery suitable for some stunt Car. 3.7v 500mah battery suitable for some kind Remote Control Gesture Sensor Stunt Car., which battery size, voltage and plug all...
3.7V 500mAh-800mAh Li-ioni battery suitable for some kind 1:16 Remote Control Car. 3.7v 500mAh Li-ion rechargeable battery suitable for some kind 1:18 Scale RC Car, , which battery size, voltage and plug all match. Battery sutiable for battery sutiable...
3.7V 500mAh-800mAh 1.85Wh Li-ion replacement battery spare parts suitable for some old version 3855 Amicool G03080R Double Sided 360° flip RC stunt Cars. 3.7V 500mAh Li-ion Battery suitable for some old version Yezi 11821 Remote Control Dinosaur Car RC...
3.7V 500mAh-800mAh Lithium battery suitable for some kind of bubble gun, which use same kind of battery. 3.7V 500mAh Li-ion battery compatible with some kind of Gesture Transform RC Drift Cars, which use same kind of battery.
【UNIVERSAL BATTERY CHARGER】 The Battery Charger can charge simultaneously rechargeable batteries of different specifications. Suitable for 3.7V lithium ion battery...
【POWERFUL CHARGER】When reaches a single slot maximum charging current of 600mA when using 3.7 volt battery charger.
【SAFE CHARGER】 This 18650 battery charger was featured overcharge and over discharge protection, short circuit protection, intelligent temperature control protection and battery reverse polarity protection. We adopted safe and fire prevention PC+ABS...
【CHARGING INDICATOR】When the indicator is RED, it means charging; when it's GREEN, it means full charged; make sure you put the battery in position and it contacts with charger. This charger will protect your battery when it's full charged no matter...
【MICRO-USB COMPATIBLE】Compatible with multiple USB inputs, especially when you don’t have enough outlet, you can even simply plug into car charger, power bank, laptop. wide range of use, more convenient for daily use.
Tips---The height of the buttton top battery and the flat top battery is different.
Button Top Size---67.01*18.01*18.01mm(2.64*1.02*1.02 inches),Button top battery (Not flat top/AA/AAA). Please check whether it is the battery type you need before purchasing.
Stable Output--- This 3.7v rechargeable battery has a large capacity of 9900 mAh, which can provide stable power for your devices - Supports a stable voltage output, ensuring more stable and safe operation of your devices.
Multiple Uses---The 9900mah Rechargeable lithium polymer-ion Battery 3.7volts output–safe for most Low-power devices,It is a reliable backup batteries widely used in headlamps,18650 flashlights, fans, doorbells, Toys.Low-power household tools.
Safety Reminder--- Store in a cool,dry place when not in use,and Keep the battery away from high temperatures, extreme cold, fire, and water.
【Wide Compatibility】This 3.7V 10000mAh lithium polymer rechargeable battery (Model 1160100) is designed for devices using a PH2.0 connector, such as Raspberry Pi UPS boards, GPS modules, cameras, MP3/MP4 players, and DIY electronic projects.
【Detailed Specifications】Voltage: 3.7V / Capacity: 10000mAh / Discharge Rate: 1C / Connector Type: PH2.0 / Max Charge Voltage & Current: DC 4.25V / 5000mA / Material: Lithium Polymer / Net Weight: 160g
【Compact Size & Safe Connection】Dimensions: 100 × 60 × 11mm (3.9" × 2.36" × 0.43"); Cable length: 5cm (2"). Compact and easy to install. Check the “+” and “–” markings before connecting to your device to ensure proper polarity and safe...
【Stable Power Output】Delivers a consistent 3.7V output with a high 10000mAh capacity, providing long working time and steady performance. Suitable for continuous low-voltage operation in compact electronic devices.
【Built-in Protection Circuit】Features a protection board that helps prevent overcharge, over-discharge, overcurrent, and short circuit. Ensures reliable charging and long-lasting battery performance.
Last update on 2026-07-17 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best 3.7V Batteries
Capacity (mAh)
Capacity, measured in milliampere-hours (mAh), indicates how much charge a battery can hold. Higher mAh means longer runtime between charges.
Consider the device's power consumption. High-drain devices require batteries with sufficient capacity to avoid frequent recharging.
Discharge Rate (C-Rating)
The C-rating denotes the maximum safe discharge current a battery can deliver. A higher C-rating is essential for devices that draw a lot of power quickly, such as high-performance vapes or power tools.
Using a battery with an insufficient C-rating can lead to overheating, reduced performance, and potential damage.
Chemistry and Safety Features
Lithium-ion (Li-ion) is common, but variations exist. Ensure the battery has built-in protection circuits (PCB) to prevent overcharging, over-discharging, and short circuits.
Always use a charger specifically designed for your battery type and chemistry.
Frequently Asked Questions
What does 3.7V mean for a battery?
The 3.7V rating refers to the nominal voltage of a single lithium-ion cell. This is the standard voltage when the battery is partially charged and represents its typical operating voltage.
How do I know if a 3.7V battery is compatible with my device?
Check your device's manual or original battery for voltage and physical size requirements. Ensure the replacement battery matches the specified voltage and fits correctly within the device's compartment.
What is the difference between protected and unprotected 3.7V batteries?
Protected batteries have a small circuit board (PCB) that prevents overcharging, over-discharging, and short circuits, enhancing safety. Unprotected batteries lack this circuit and require careful handling and external management.
How should I store 3.7V batteries when not in use?
Store batteries in a cool, dry place, away from direct sunlight and extreme temperatures. For long-term storage, it's often recommended to keep them at around 50% charge to prolong their lifespan.
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