4 Slot Battery Charger Four-Slot Universal Charger Charging for 3.7v Lithium Rechargeable

The Bestom 4 Slot Battery Charger is a dedicated power station designed to charge 3.7V lithium rechargeable cells. It solves the hassle of managing individual cells by providing four separate bays, allowing you to charge anywhere from a single battery up to four cells simultaneously.

Wide size compatibility is a key strength of this unit. It accommodates common sizes such as 18650, 26650, 16340, 14500, and RCR 123A, alongside several less common cylindrical formats. Built-in LED lights make monitoring simple: the indicator illuminates red when powered and actively charging, then turns green once the battery reaches full capacity.

Safety features include under-voltage, over-voltage, over-current, and over-temperature safeguards, along with short-circuit and anti-reverse polarity protection. The hardware also incorporates a zero volume battery repair function and a heat dissipation layout to manage temperatures during active cycles.

Keep in mind that this unit is designed exclusively for 3.7V lithium rechargeables, so standard household nickel-metal hydride or non-rechargeable cells will not work. Additionally, it relies on a standard US plug for power, and the status lights only show active charging versus full charge rather than exact percentage readouts.

Verdict: This charger is a solid, straightforward choice for anyone regularly using 3.7V lithium rechargeable cells in flashlights or electronics. It offers flexible multi-slot charging and essential safety protections in a simple plug-and-play format.

A great fit if you:

• Use 3.7V lithium rechargeable batteries like 18650 or 26650 cells.
• Need the flexibility to charge anywhere from one to four batteries independently.
• Want straightforward LED indicators that clearly show when charging finishes.
• Value built-in protections against reverse polarity and short circuits.

Consider something else if you:

• Need to recharge standard 1.2V NiMH or non-lithium household batteries.
• Require a charger with an international plug type or USB power input.

Can I charge just one battery at a time?
Yes. Each of the four slots operates separately, so you can charge one, two, three, or four batteries at once.

How do the LED status lights work?
The light shows red when the charger is connected to power and actively charging, and switches to green when the battery is fully charged.

What types of batteries are compatible with this charger?
It works with 3.7V lithium rechargeable batteries, including sizes 26650, 18650, 17670, 18490, 17500, 17335, 16340, RCR 123A, 14500, 10440, 14650, 18350, and 18500.