Top 10 Best 3 7 volt 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

ChoiceComparer.com Score

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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VBILUM

3.7V Battery Charger with SM-2P Plug USB Li-ion Battery Charger for RC Car Amphibious Stunt Car Trucks Boats 3.7 Volt Battery Charger for Bazooka Rocket Blower Bubble Gun Battery Charging Cable (2PCS)

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•3.7V USB charging cable for bazooka rocket blower bubble gun machine battery and some bubble blaster battery. (ONLY suitable for 3.7 volt and 2 pin lithium batteries)
•3.7V battery charger for RC cars, trucks, boats, stunt cars, robot and some toys. (ONLY suitable for 3.7 volt and 2 pin li-ion batteries)
•3.7 volt battery charger can charge 3.7v 14500 and 3.7v 18650 batteries. It can charge 3.7v 500mah 800mah 1200mah lithium batteries. Do not charge batteries over 2000mah because it will take more time and charge slowly.
•3.7v lithium battery charger supports 5V 0.5-2A input and 3.7v 500mA output for fast charging.
•RC car charger and bubble gun battery charger can be connected to a 5V adapter, a power bank, or a laptop. The red light is on when the battery is charging, and the red light is off when it is fully charged.

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$4.99

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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

9.2

ChoiceComparer.com Score

9.2

/ 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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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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EBL

EBL Smart Rapid Battery Charger for Rechargeable 3.7V/3.6V Li-ion IMR Batteries 26650 18650 21700 14500 16340(RCR123), Ni-MH/Ni-Cd AA AAA C Batteries, Upgraded

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•[Wide Compatibility] - Compatible for 3.7V/3.6V Li-ion Lithium-ion IMR INR ICR 10440/14500/14650/RCR16340/16650/17500/17650/17670/18350/18490/18500/18650/20700/21700/21750/22700/26650/26700 rechargeable batteries and Ni-MH/Ni-Cd AA AAA rechargeable batteries.
•[Fast Battery Charger] - The upgraded TC2S universal battery charger features a charging current of up to 2000mA (max) for a single lithium battery, 1000mA for 2pcs lithium batteries, and 500mA for 2pcs ni-mh/ni-cd batteries. effectively charging batteries, saving your time.
•[Smart LED Indicator] - This lithium ion battery charger with intelligent LED light not only has the capability to detect faulty/non-rechargeable batteries but also identifies lithium batteries and nimh/nicd batteries. Additionally, it can show its charging progress, when 3 LED lighting together means the battery is fully charged.
•[0V Activation Function] - The TC2S battery charger is capable of activating rechargeable batteries that have been over-discharged and equipped with protection boards.
•[Safety Guarantee] - Advanced MCU control and -∆V function, over-heat and over-current protection, short-circuit protection, over-voltage protection, over-discharge protection, non-rechargeable, and defective battery detection.

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$9.99

$13.99

-29%

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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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WANGDAJIEDIAN

18650 Battery Charger, Suitable for 3.7v Lithium Batteries 20700 10440 14500 18500 16340 17500 18650, USB Single Slot Rechargeable Li-ion Battery Charger (Battery not Included)

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•【Universal Battery Charger】 The Battery Charger can charge simultaneously rechargeable batteries of different specifications.Suitable for 3.7V Li-ion rechargeable batteries - 10440 14500 16340 17335 17500 17650 18350 18500 18650 18700 25500. 𝐍𝐨𝐭 𝐬𝐮𝐢𝐭𝐚𝐛𝐥𝐞 𝐟𝐨𝐫 𝐍𝐢-𝐌𝐇, 𝐍𝐢-𝐂𝐝, 𝐀𝐀, 𝐀𝐀𝐀, 𝐀𝐀𝐀𝐀, 𝐚𝐧𝐝 𝐂 𝐛𝐚𝐭𝐭𝐞𝐫𝐢𝐞𝐬.
•【Widely Use】It works from Micro USB interface at input 5V/1A, and output 3.7V/1A, (1000mAh, others are normally 500mAh and slower than this charger) to charge a Li-ion battery.
•【Safe Charge Protection】18650 Battery charger has microcomputer control technology, built-in intelligent circuits protection could effectively prevent over charge, over discharge, over current, over voltage, over heat, short circuit and battery reverse polarity conditions to protect the battery safety charged.
•【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. Portable size charging set easy to carry when out or travel.
•【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 how long you will leave the battery in the charger.

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$5.99

$6.99

-14%

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