IMREN 26650 10400 Battery Charger

The IMREN 26650 2-Bay USB-C battery charger charges a wide range of 3.7V Li-ion cells and 1.2V Ni‑MH/Ni‑Cd cells with selectable 1A or 2A currents and portable USB‑C power.

This compact two-slot charger is built to handle long-format cells like 26650 and everyday sizes such as 18650, plus common Ni‑MH cylindrical batteries. It uses a wider 25mm slot design so large-diameter cells fit comfortably, and a simple MODE button toggles between standard and high‑speed charging. The USB‑C input enables flexible power sources — from power banks to laptop ports — making it convenient for home, travel, or workshop use.

How fast can the IMREN 26650 charger refill batteries?

The charger offers two charge-rate settings: 1A (1000mA) for gentle, slower charging and 2A (2000mA) for faster charge times when supported by the battery. The default is the 1A mode for safer, low-heat charging, and you can switch to 2A with the central MODE button when you need quicker turnaround.

• Default 1A charging for balanced speed and cell longevity
• Optional 2A fast charge for compatible cells and when time is limited
• Display shows active current mode so you know which speed is running

Which battery sizes and chemistries does it support?

IMREN designed this charger to accept many common cylindrical batteries: from small AAAA/AAA through A/AA, 10440 and 14500 to larger 18650, 21700 and 26650 Li‑ion cells. It also charges 1.2V Ni‑MH/Ni‑Cd rechargeable cells, making it a versatile unit for mixed battery collections.

• Compatible Li‑ion sizes: 10440, 14500, 16340, 18350, 18650, 21700, 26650, etc.
• Compatible Ni‑MH/Ni‑Cd: AAAA, AAA, AA, A cells
• Not for single‑use (non‑rechargeable) batteries — always confirm cell type before charging

Is it safe and easy to use while traveling?

Yes — the USB‑C input makes it suitable for travel since you can power the charger from common USB outlets, power banks, car adapters, or laptops. The unit’s two wide slots securely hold larger cells, and the simple button interface keeps operation straightforward while on the go.

• USB‑C power lets you use universal adapters and power banks
• Wide 25mm slot accommodates 26650 and other large cells
• Compact footprint fits into a gear bag or carry case with included Type‑C cable

How does the dual-slot and current switching work?

The charger holds two batteries at once in independent slots, so each cell charges individually. Pressing the MODE button toggles both slots between the 1A and 2A charging profiles; the charger’s circuitry monitors and applies the chosen current to both bays simultaneously.

• Two independent slots let you charge two different cells at the same time
• Mode button switches both bays between 1A and 2A settings
• Automatic recognition of inserted battery size and chemistry for proper contact alignment

Who is this for: The IMREN 26650 2‑bay USB‑C charger is a practical pick for hobbyists, flashlight and vape enthusiasts, and anyone who uses a mix of large lithium cells and standard Ni‑MH batteries. It’s ideal if you want a travel‑friendly charger that accepts oversized cells like 26650 while offering a fast‑charge option and the convenience of USB‑C power.