42V 2A Battery Charger for 36V Lithium Batteries - Fast, Cooled

In this review of the Jeoronuly 42V 2A Battery Charger, the bottom line is simple: it is a straightforward replacement charger for 36V lithium battery packs that prioritizes faster charging and thermal safety. The reviewer found it best for riders and homeowners who need a reliable, universal power adapter to recharge 36V Li-ion packs without fuss. The charger excels at faster top-up charging and includes active cooling, and it is a practical choice when the correct mini 3-prong inline connector matches the battery.

Key Features

• Fast 2A Charging: The 42V 2A output provides higher current than many stock chargers so batteries reach full charge more quickly.
• Universal Smart Power Supply: Designed to work specifically with 36V lithium battery packs, the smart circuitry stops charging automatically when the battery is full.
• Active Fan Cooling: Fans on both sides reduce heat buildup during charging and help prevent safety hazards from overheating.
• Wide Input Range: AC 100-240V 50/60Hz input makes the charger usable in different regions without a step-down transformer.
• Mini 3-Prong Connector: The female mini 3-pin inline connector with an 8.8mm/0.33in diameter fits batteries that use this specific plug style.
• High Reliability and Efficiency: Built with a focus on longer service life and improved conversion efficiency compared with basic chargers.

Who It's For

The Jeoronuly charger is ideal for owners of electric scooters, e-bikes, lawn tools, or other devices that use 36V Li-ion packs and accept the 8.8mm mini 3-prong inline connector. It is well suited for users who want a replacement that charges faster than many OEM supplies and offers extra thermal protection from the built-in fans.

It is not for people whose battery packs require a different connector style, voltage, or chemistry; the unit is for charging 36V lithium batteries only and does not fit some proprietary plugs or Razor batteries. Buyers who need multi-voltage or multi-chemistry chargers should look elsewhere.

Pros & Cons

Pros

• Faster 2A charging shortens recharge time compared with lower-current adapters.
• Automatic cutoff protects the battery from overcharge once full.
• Dual-side fans reduce overheating risk during extended charge cycles.
• Works with standard AC 100-240V mains for broad compatibility.

Cons

• Only compatible with 36V Li-ion battery packs and the specific 8.8mm mini 3-prong connector, so fit must be confirmed before purchase.
• Manufacturer notes it does NOT fit Razor devices, limiting universality for some users.

Specifications

Input	AC 100-240V 50/60Hz 1.5A
Output	42V 2A
Battery Type	36V Lithium (Li-ion) only
Connector Tip	Female mini 3-pin inline, 8.8mm / 0.33in diameter
Cooling	Fans installed on both sides
Function	Smart charger with automatic stop when full

Our Verdict

The Jeoronuly 42V 2A charger is a practical, value-conscious replacement for 36V Li-ion batteries when the mini 3-prong plug matches your pack. It combines faster 2A charging with smart cutoff and active cooling, making it a safer and quicker option than basic adapters for compatible devices.

Frequently Asked Questions

Will this charger work with 36V lead-acid batteries?
No. This unit is designed for 36V lithium (Li-ion) batteries only and should not be used with lead-acid batteries.

What connector size does it use?
The charger uses a female mini 3-pin inline connector with an approximate diameter of 8.8mm (0.33in).

Can it be used worldwide?
Yes. The input accepts AC 100-240V 50/60Hz so it is compatible with mains voltages in multiple regions.