NITECORE UMS4 4-Slot Smart Charger & 4x Molicel INR18650-P26A Flat Top Battery Kit (2600mAh 35A Extreme High Drain)

Why This Bundle

The Molicel P26A earned its reputation as one of the strongest high-drain 18650 cells on the market — a 2600mAh capacity backed by a 35A continuous discharge rating (25A sustained, up to 35A with thermal cutoff), with a flat, stable discharge curve that holds up better under load than most competitors. A set this capable deserves a charger that can handle every cell at once while keeping close watch on their health. This bundle pairs 4 genuine Molicel INR18650-P26A Flat Top batteries with the NITECORE UMS4, a QC-enabled 4-slot charger with a detailed LCD display, independent bay control, and multiple layers of protection — ready to use straight out of the box.

Molicel INR18650-P26A (Flat Top) Specifications

Note: This is a high-drain, unprotected cell — avoid mixing with batteries of a different brand, model, or charge state, and inspect the wrap for damage before every use to prevent short circuits.

The Charger: NITECORE UMS4

• USB-C input with QC support: up to 4,000mA total output; up to 3,000mA on a single bay with a QC adapter
• QC Mode output: 3,000mA×1 / 2,000mA×2 / 1,000mA×4 — Standard Mode: 2,000mA×1 / 1,000mA×2 / 500mA×4
• Independent 4-bay control: charge and monitor up to 4 batteries separately, with each bay unaffected by the others
• Detailed real-time LCD display: shows battery health (Good/Poor), internal resistance, charging current, voltage, battery type, charged capacity, charging time, cut-off voltage, and charging mode
• 3 automatic charging modes: CC, CV, and -dV/dt, selected automatically based on battery type and charge level
• Manual adjustment: set charging voltage and current for specialized battery types
• Safety features: automatic internal resistance detection, reverse-polarity and short-circuit protection, overtime charging protection, and over-discharged battery activation/restoration
• Fire-retardant PC/ABS housing with built-in temperature regulation
• Universal power input: works with wall adapters, power banks, and solar panels via USB-C

NITECORE UMS4 – Supported Battery Types & Voltage

Compatible with 3.6V/3.7V Li-ion, 3.8V Li-ion, 3.2V LiFePO4, and 1.2V Ni-MH/Ni-Cd batteries, including the Molicel P26A (18650) in this bundle:

IMR/Li-ion/LiFePO4: 10440, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 17700, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650, 26700 Ni-MH/Ni-Cd: AA, AAA, AAAA, C, D

Output current: up to 3,000mA per bay (QC mode) / 4,000mA total

Compatibility Notes

The UMS4 uses spring-loaded contacts that accommodate Flat Top batteries securely without any adapter. P26A Flat Top cells measure about 65.0mm, well within the UMS4's compatible battery range. All 4 cells in this bundle can be charged simultaneously across the charger's 4 independent bays.

Note: When only 1 bay is in use, the UMS4 can reach up to 3,000mA with a QC adapter — close to the P26A's 2.6A rated charge current. With all 4 bays in use, each will charge more gently at up to 1,000mA (QC mode) or 500mA (standard mode).

What's Included

• Molicel INR18650-P26A Flat Top Battery × 4
• NITECORE UMS4 4-Bay Charger × 1
• USB-C Charging Cable × 1
• User Manual × 1

Safety Tips

• Store batteries in a proper case, keeping them away from loose metal objects to prevent short circuits
• Never disassemble, puncture, burn, or submerge the batteries
• Charge only with a genuine, compatible charger such as the NITECORE UMS4
• The P26A is an unprotected, high-drain cell intended strictly for compatible, purpose-built devices — do not use it in unauthorized or modified equipment
• Never discharge below 2.5V or charge above 4.2V
• Flat Top batteries are commonly used in devices with spring or flat-contact battery holders (e.g., battery packs and power tools) — check your device's terminal requirements before use

FAQ

Q: Can the NITECORE UMS4 charge Molicel P26A Flat Top batteries safely? A: Yes. The UMS4 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for P26A cells, with real-time monitoring on its LCD display.

Q: Can I charge all 4 batteries at the same time? A: Yes. The UMS4 has 4 independent bays and can charge all 4 cells simultaneously — up to 1,000mA per bay in QC mode, or 500mA per bay in standard mode, when all 4 slots are used at once.

Q: Will Flat Top batteries sit properly in the UMS4 charger bays? A: Yes. The UMS4's spring-loaded contacts are designed to accommodate both Flat Top and Button Top cells without any adapter or modification.

Q: How do I know if a P26A battery is degraded? A: The UMS4's LCD display shows battery health as "Good" or "Poor" along with internal resistance readings, making it easy to spot cells that have aged or lost performance.

Q: Is 35A continuous discharge safe for everyday devices? A: No — the P26A is a high-drain cell intended strictly for devices specifically engineered for high continuous discharge, such as certain power tools, and high-output flashlights. Always check your device's battery requirements before use.

Q: Can I power the UMS4 with a power bank while traveling? A: Yes. The UMS4 has a USB-C input and works with wall adapters, power banks, and solar panels.

Q: How does the P26A compare to other high-drain 18650 cells like the Sony VTC5A? A: Independent testing has shown the P26A to outperform many earlier high-power 18650 cells, including the Sony/Murata VTC5A, thanks to a notably flat discharge curve that holds voltage steadier as current increases.

Q: What's in the box? A: 4 Molicel INR18650-P26A Flat Top batteries, 1 NITECORE UMS4 charger, a USB-C charging cable, and a user manual.