Top 10 Best 3 7v battery charger in 2026

Last Updated - 6/25/2026

🏆Best Choice

Blomiky

Blomiky 2 Pack 3.7V USB Charger Cable with SM-2P Plug Connector for Mini RC Amphibious Stunt Car Boat Trucks 1S Li-ion and Li-Po Battery / 3.7V USB 2

9.8

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9.8

/ 10

Outstanding

Main highlights

•USB Charger cable built-in over charged protection board, it will stop charge after full charged, some red light are not off after full charged, It most take 3-4 hours can full charged 1S 500mAh , It take double time (6-7 hours )to charge 1S 1000mAh battery. Charge connector plug: SM-2P black 2 pin, only suitable for 3.7V 400mAh 500mAh 800mAh Li-ion or Lipo rechargeable small battery, don't advise use in big capacity battery,such as 1500mAh battery, it may take over 10-15 hours to full charge.
•3.7V USB Charger cable suitable for Small Size RC Cars RC Boat, RC Trucks ,charger cable suitable for some kind Amphibious some kind 1:18 1/16 scale RC Vehicle Sharkool 4WD Stunt RC Car Cars 500mAh Li-ion Battery,,which voltage and plug are same.
•3.7V 1S USB Charger cable suitable for Some kind DE42 DE44 DE45 DE68 DE69 RC Trucks , Charger cable suitable for some kind of 1:20 Scale RC Trucks, Charger cable suitable for Seckton Small Remote Control RC Car 3.7V Battery
•3.7V USB Charger cable suitable for some kind small size Drift RC Car some kind of Wave Small RC Boat Battery,,which voltage and plug are same, 3.7V charger cable suitable for LY-017 TOLLCY TR10 TR11 Small RC Boats.
•3.7V USB charger adpater cable suitable for some kind 1/18 scale RC Car and 3.7V charger cable suitable for some 1:16 Remote Control Car. Charger cable suitable for some kind small szie RC Trucks or RC Crawlers battery,,which voltage and plug are same.
•3.7V Lithium charger cable suitable for Hony Zizz LECPOP YL-101 Axirata onadrive RC dinosaur USUT Landtaix Small szie Amphibious RC Car Boat. which battery plug is same SM-2P black 2 pin.
•3.7V carger cable suitable for Some Bunch O Bubbles, suitable for some Bubble Bazooka Machine, which use 3.7V SM-2P plug li-ion or lipo battery.

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$6.29

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HCHNH

[2-Pack] 3.7V Battery Charger for Bunch O Bubbles, Bubble Bazooka Machine Gun, Mini RC Amphibious Stunt Car Boat Trucks 3.7 Volt Li-ion and Li-Po Battery, SM-2P USB Charger Cable with LED Indicator

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•【Perfect Compatibility】Charger for Bunch O Bubbles, Bubble Bazooka Machine Gun, Small Size RC Cars RC Boat, RC Trucks ,charger cable suitable for some kind Amphibious some kind 1:18 1/16 scale RC Vehicle Sharkool 4WD Stunt RC Car Cars 500mAh Li-ion Battery,which voltage and plug are same.
•【Continuously Compatible】Charger for DEERC DE42 DE44 DE45 DE68 DE69 RC Trucks , Charger cable suitable for BEZGAR TS201 TC141 TB202 TB201 1:20 Scale RC Trucks, Charger cable suitable for Seckton Small Remote Control RC Car 3.7V Battery. //// some kind small size Drift RC Car some kind of Wave Small RC Boat Battery,which voltage and plug are same. //// some kind 1/18 scale RC Car and 3.7V charger cable suitable for some 1:16 Remote Control Car. Charger cable suitable for some kind small szie RC Trucks or RC Crawlers battery,which voltage and plug are same.
•【Product Attribute】SM-2P Plug Connector, 3.7V Li-ion and Li-Po Battery USB Charger Cable / 1.8Ft Long Cable.
•【LED Indicator】Green Light Flicker when Charging, Green Light Solid when Fully Charged. Protect your Equipment.
•【Security】Replacement chargers manufactured with the highest quality materials and include multiple smart features safeguarding against IV - incorrect voltage, SC - short circuit, IO - internal overheating . Our Products are in Compliance with Top Industry Standards.

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$5.98

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Tosiicop

Tosiicop 3.7V Lipo Battery Charger - SM-2P Cable RC Toy Remote Control Car Vehicle Rechargeable Li-ion Batteries Chargers USB for Bunch Bubble Gun Stunt Truck Boat 2 Pack

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•🔌【RC Battery Charger】Remote control vehicle chargers wide applications for RC toy of cars,truck,stunt,boat,FPV drone quadcopter,amphibious,1/18 1/16 scale vehicle(ONLY 3.7V with SM-2P plug lipo battery e.g.ASINs B0CR68C6NB/B0CR447PQT)
•🔌【Bubble Gun Charger】Splat ball chargers wide applications for bubble blasters toy of rocket bubble gun,bazooka bubble gun,splatrball gun replacement(Only 3.7V with SM-2P plug lipo battery)
•🔌【Charger Circuit Protection】Smart charger IC circuit board of over-voltage,overload,over-heat,overcharging.Indicator light:Charging--green light is flashing and red light is solid.Fully charged--green light
•🔌【Rechargeable Battery Charger】Input--5V 2A;Output--3.7V 0.5A;Connector--USB to SM-2P Plug. Only 20g weigh to convenient for you replacement go outdoor.Suppprt power source from phone,power bank,computer and other USB port
•🔌【Package List】2PCS 3.7volt replacement cord battery chargers
•🔌【Note Before Your Order!!!】ONLY 3.7V 2A Lipo battery & SM-2P plug.Please use 3.7V battery above 500mAh below 2000mAh

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$5.99

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Blomiky

Blomiky 1S Lipo 3.7V-3.8V 0.5A USB Charger Cable with JST-PH2.0 Connector Plug Compatible with EMAX Small Hawk S or Free Style RC Drone / 3.7V Ph2.0 USB 2

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•PH2.0 Connector end cross-section dimensions:6*4.9mm / 0.236*0.192inch (L*W). check your orignal charger plug are same or not first.This 3.7V PH2.0 USB charger cable only fit for 1S 3.7V/4.2V Li-ion or Lipo with JST-PH2.0 Plug Battery. Charger plug suitable for Tiny Whoop 1S battery. Charging manual:USB Charger cable Red light is solid when charging,red light is off after full charged.
•USB charger cable length about 63mm/24.8inch. Charger cable suitable for PRANITE RC Robot.
•USB power input range: 5V , 0.5~2A,Max 2.4A, Output:4.2V 0.5A, You can use PC USB port, phone USB Charger or Power bank to use together.
•3.7V 3.8V /4.2V 1S Lipo battery charger cable fit for Small Hawk S or Free style F4 3.8V 450mAh Lipo battery.
•Battery Charger cable suitable for JJRC H36 H67 Blade Inductrix E010 E013 RC Quadcopter
•Battery charge cable suitable for Holy HS210 RC drone.

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$7.99

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Blomiky

Blomiky 6-in-1 1S Li-ion/Lipo 3.7V-3.8V USB Seat Charger with JST-PH2.0 and JST1.25 Plug Suitable for Emax 1S 450mAh Lipo Battery / 6-in-1 Charger.

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•Charger port JST 1.25 and JST-PH2.0 , each 6 ports. charge current support 0.2A or 0.6A with switch button.,
•Seat charger only support 3.7V / 3.8V 1S 1-cell Lipo or Li-ion lithium battery, which use JST 1.25 or JST-PH2.0 Charger plug.
•Input: 5V 2A, Output:4.2V 0.2A or 0.6A. charge rate:1C. It can charge 6 battery at same time.
•3.8V /3.7V USB seat charger fit for 2 Freestyle S EZ-Pilot Mini Brushless 3.8V 450mAh Lipo battery.
•Bulit-in over-charged over-heated protection board, Green light is solid when charging, green light would be off after full charged.
•USB seat charger fit for JJRC H67 H36 Mini RC Quadcopter, Charger fit for Blade Inductrix E013 E010 Tiny Whoop RC Quadcopter.

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$8.79

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DORHEA

5Pcs LM2596S Driver DC-DC Constant Current Module, Dorhea LM2596 DC-DC 7V-35V Step-Down CC/CV Power Supply Module Battery Charger Adjustable LM2596S Voltage Converter Current Charging Board

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Non-isolated step-down constant current, constant voltage module (CC CV) charging module.
•Input voltage: 7-35V; Output Voltage: 1.25-30V.
•Output current: rated current 2A, maximum 3A (need to add heat sink), if the output power greater than 15W, combined heat sink is proposed.
•Rectification: non - synchronous Rectification.
•Application: Charger for all batteries in the range 1.23V ~ 28V, only set the precise battery voltage and charging current，high conversion when used in car，adjustable laboratory voltage source，LED driver with constant current，dimming devices，laboratory power supply.

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$9.99

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Swanlake

Swanlake 18650 Battery Charger,Single-Slot Intelligent Battery Charger for 3.7V Li-ion 18650,26650,21700,18500,18350,16650 Rechargeable Battery (not Including Battery

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•INTELLIGENT UNIVERSAL CHARGER:The Battery Charger can charge simultaneously rechargeable batteries of different specifications.Suitable for 3.7V Li-ion rechargeable batteries 26650,18650,21700,18500,18350,14650,16650,16340,14500,10440
•CONVENIENT CHARGING INTERFACE:USB charging help travelers can charge lithium ion batteries anytime anywhere, especially when you don’t have enough outlet,you can even simply plug into your laptop or other device
•INTELLIGENT CHARGING:The charger can automatically select the best charging current and support 2-slot simultaneous independent charging.Intelligent LED charging status indicator, when the battery is full, it changes from red to green and the charger will automatically stop charging
•SAFE CHARGING:Safe and fire prevention PC+ABS material Battery Charger, with heat-resisting, low temperature resistance and scratch resistance;the battery will not be over-charged and over heat
•PREMIUM SERVICE: If you have any questions, please tell us at first time. We will provide professional service to solve your problems. There is a totally risk-free purchase

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$5.99

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Imren

IMREN 18650 Battery Charger,21700 Battery Charger for 3.7V 14500 10400 18500 18350 18650 18700 20700 21700 22650 26650 Li-ion Battery,1.2V Ni-MH/Ni-Cd Battery,4 Bay 18650 USB C Charger

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•【18650 Battery Charger】-The 18650 Charger for -1.2V Ni-MH Ni-Cd A/AA/AAA/AAAA 10440 14500 14650 16340 17335 17500 18500 18350 18650 18700 20700 21700 22650 25500 Battery
•【Smart 21700 Battery Charger】-The 18650 battery charger have a Single battery charging capability,You can charge any number of batteries without charging in pairs. This can better extend battery life.Intelligently identify input power and automatically adjust suitable charge current, the battery charger can automatically detect Li-ion and Ni-MH batteries and charge different type of batteries at same time and separately
•【2000mA Fast Charger】- The 20700 battery charger there current patterns, and you can freely switch between 0.5 / 1A / 2A with the middle button.The default two slots are 1A current normal charge mode, press the MODE button, automatically switch to 2000mA current fast charge mode
•【USB C Battery Charger】-USB C Powered Universal Intelligent 18650 Battery Charger, allows for on the go worldwide portability.the USB charging cable can be connected to USB socket, car charger, computer, phone adapter, other USB output equipment to charge
•【75MM Long Slot】 -The 21700 battery charger has 75 mm slot, support Battery less than 75 mm, such as 21700 20700 26650 18650 battery with botton top
•【What You'll Get:】 - 1 IMREN 4 bay 3.7V/1.2V battery charger, 1 Type-C cable, user manual, (Do not charge non-rechargeable batteries.)

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$19.99

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delicoco

D&F Dual Battery Charger with 4 Pack Replacement Battery 3.7V 900mAh Li-ion Compatible with SJCAM SJ4000 SJ5000 SJ6000 M10 Action Camera

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•3.7V Li-ion Battery 900mAh
•Get extra battery for journey back up
•Camera battery charger is designed to facilitate charging 2 batteries at the same time, effectively saving charging time
•Safety Prevent battery overcharge, safe and reliable
•Package Include:4 x Battery ( Camera not include ) 1 x Daul Charger (With Cable)

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$16.99

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LSXdetoro

4pcs 1￵8￵6￵5￵0 Rechargeable Batter￵y W￵i￵th 18650 Battery Charger,Universal Smart Charger for 3￵.7V L￵ithium ion Batteries LSXdetoro (4pcs Button Top Batter￵y+Charger)

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•USB Charger Safety Protection Under voltage protection, over voltage protection, over current protection, over temperature protection, short circuit protection, excellent heat dissipation design .the product excludes the sale of restricted Standalone lithium batteries.
•Compatible Devices: Battery for flashlights, headlights, fans, digital cameras, radios, speakers, surveillance equipment.
•Charging display-This Battery charger with Red/Green led light display, And the charger will display the status of each rechargeable battery when charging,Automatically detects battery power status and automatically stops charging when complete.
•4 bay Battery Charger :4 charging channels can charge the battery independently. 4 slots can be adjusted according to different battery sizes.

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$21.98

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