The 3.7V lithium-ion battery and its USB-powered chargers are popular for small electronics, remote control toys, and portable devices. This guide highlights five reliable options, detailing key features, compatibility, and charging behavior to help you choose the right kit for your needs.
Summary Of Selected Products
- LSXdetoro 4pcs 18650 Battery With USB Charger — Universal smart charger with protection features.
- Blomiky 2 Pack 3.7V 500mAh Li‑ion Batteries — Compact 1S cells with USB charging considerations.
- VICMILE 3.7V 800mAh Li‑ion Battery 2Pack — Ready-to-use RC replacement packs with USB charging compatibility.
- Tosiicop 3.7V Lipo Battery Charger — Multifunction charger for RC toys and bubble guns with smart indicators.
- Tokeyla 18650 4 Bay Smart Charger — Four independent channels for versatile Li‑ion charging.
LSXdetoro 4pcs 18650 Battery With USB Charger
Brand: LSXdetoro
Product highlights: This kit includes four 18650-type rechargeable batteries and a universal smart charger. The charger family features under voltage, over voltage, over current, over temperature protection, short circuit protection, and efficient heat dissipation. A red/green LED display indicates charging status for each cell, and the charger automatically stops when charging completes. Important note: no 18650 batteries are included; the package contains a charger and compatible cells.
Blomiky 2 Pack 3.7V 500mAh Li‑ion Batteries
Brand: Blomiky
Product highlights: Real capacity ranges from 500mAh to 800mAh with a 3.7V Li‑ion cell and a SM-2P 2‑pin plug. Designed for small 1/18 scale RC vehicles and similar devices. Features USB-charged built-in protection and auto-stop when fully charged. Note that color may vary (orange, green, red). Several RC models are listed as compatible, so ensure plug size, voltage, and device compatibility before purchasing.
VICMILE 3.7V 800mAh Li-ion Battery 2Pack
Brand: VICMILE
Product highlights: Each battery delivers a real 800mAh capacity at 3.7V with SM-2P plug compatibility. Compatible with several RC models including E35, DE38, DE40, DE50, and DE55, as well as TB202 and TM141, provided the physical dimensions and plug match. The pack emphasizes safe charging with low memory effect and consistent performance without strict deconditioning requirements.
Tosiicop 3.7V Lipo Battery Charger
Brand: Tosiicop
Product highlights: A versatile charger aimed at RC toy batteries and bubble gun applications. Supports 3.7V Li‑ion/Li‑Po cells with SM-2P plug, suitable for a range of 1/18 and larger scale vehicles, boats, and stunt equipment. The charger includes smart protection features for over-voltage, over-current, and over-heat, with indicator lights showing charging progress (green flashing during charging, red solid, green solid when complete).
Tokeyla 18650 Battery Charger 4 Bay
Brand: Tokeyla
Product highlights: A four-bay smart charger designed specifically for Li‑ion/Li‑ion variants, including 18650 and other compatible sizes. The unit provides independent charging channels and USB input. The design emphasizes safe charging with smart protection protocols and a user-friendly indicator system to monitor each battery’s status during charging. Not a battery inclusion, but a versatile charging solution for multiple 3.7V cells.
Buying Guide: Key Purchase Considerations For 3.7V Battery And Charger Kits
- Battery chemistry and form factor: Ensure the cells are Li‑ion (lithium‑ion) and that the size matches your device’s battery compartment (e.g., 18650, 26650, 10440, etc.).
- Voltage and capacity: Most 3.7V packs range from 500mAh to 800mAh per cell in consumer kits. Higher capacity improves runtime but may require compatible devices and connectors.
- Connector compatibility: Check plug type (SM-2P 2‑pin is common for RC devices). Mismatched connectors can prevent charging or damage devices.
- Charger features: Look for independent charging bays, automatic cut-off, over-voltage and over-current protection, temperature monitoring, and LED indicators to monitor progress.
- Safety and protection: Verify short-circuit protection, overtemperature safeguards, and heat dissipation. Note any warnings about incompatible devices (e.g., not suitable for AA/AAA or non‑Li‑ion cells).
- Device compatibility: Confirm the battery’s dimensions, voltage, and connector type align with your RC cars, drones, flashlights, camera gear, or other electronics.
- Future-proofing: A multi-bay charger with USB input offers flexibility for traveling or devices without dedicated chargers. Consider whether you need 4 bays or just a compact 2‑bay unit.
- Maintenance and usage: Be aware of charging times—some batteries fully charge in 3–4 hours, while larger packs may take longer. Monitor indicators and avoid leaving devices on chargers unattended for extended periods.
- Price and replacement parts: Compare bundles (batteries with charger vs. charger only) and confirm whether additional batteries are readily available for your use case.