Why This Bundle
The Molicel P28A takes the acclaimed P26A formula and pushes the capacity a bit further — 2800mAh at the same 35A continuous discharge rating, with the same low internal resistance and flat voltage curve under load. A set this size deserves a charger that can handle every cell at once while keeping tabs on their health. This bundle pairs 8 genuine Molicel INR18650-P28A Flat Top batteries with the XTAR VC8, an 8-bay Type-C charger with real capacity testing, internal resistance detection, and independent monitoring for every slot — ready to use straight out of the box.
Molicel INR18650-P28A (Flat Top) Specifications
| Item |
Spec |
| Model |
Molicel INR18650-P28A (Flat Top) |
| Typical Capacity |
2800mAh |
| Minimum Capacity |
2600mAh |
| Nominal Voltage |
3.6V |
| Max Continuous Discharge |
35A (rated with 80°C thermal cutoff) |
| Standard Charge Current |
2.8A |
| Maximum Charge Current |
6A |
| Charge Cutoff Voltage |
4.20±0.05V |
| Discharge Cutoff Voltage |
2.5V |
| Internal Resistance |
≤20mΩ (AC 1kHz) |
| Chemistry |
INR (Lithium Nickel Manganese), high-drain |
| Cell Size |
18650 (approx. Φ18.5mm × 65.15mm) |
| Terminal Type |
Flat Top — level positive terminal, suited for devices requiring full-surface contact |
| Typical Use |
Power tools, high-output flashlights, electric mobility, battery pack builds, and other demanding high-drain applications |
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: XTAR VC8
-
Type-C input with QC3.0 support: up to 3A on a single bay when battery resistance is low enough
-
5 adjustable current levels: 3A×1 / 2A×2 / 1A×4 / 0.5A×8 / 0.25A×8 — manually selectable to match your charging needs
-
8 independent charging slots: each bay monitored and controlled separately
-
Real Capacity Test (Grading Mode): on CH1–CH4, the VC8 tests true capacity through a charge–discharge–charge cycle at a stable 300mA discharge current, revealing whether a battery's stated capacity is accurate
-
Storage Mode: charges or discharges batteries to their rated storage voltage to maximize battery lifespan
-
Smart Battery Type Detection: automatically identifies the battery and selects the optimal charging strategy
-
VA LCD Display: real-time voltage, current, mode, battery type, internal resistance, and charged capacity for every slot
-
Multiple Safety Protections: over-current, overcharge, over-voltage, and short-circuit protection; automatically stops after full charge; reverse-connection and over-discharge activation for protected cells
-
Built from fire-retardant PC/ABS material, with a built-in "Three-Stage Lithium Battery Charging System" (Patent No. 201720828840.6)
XTAR VC8 – Supported Battery Types & Voltage
Compatible with 3.6V/3.7V Li-ion/IMR/INR/ICR batteries, including the Molicel P28A (18650) in this bundle:
10440, 14500, 14650, 16340, 17500, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650
Also compatible with 1.2V Ni-MH/Ni-Cd batteries: AAAA, AAA, AA, A, SC, C
End-of-charge voltage: 4.20±0.05V (Li-ion) / 1.45±0.1V (NiMH) · End-of-charge current: <120mA
Compatibility Notes
The VC8's slider-style contacts accommodate battery lengths from 32mm to 76mm, fitting Flat Top batteries securely without any adapter. P28A Flat Top cells measure about 65.15mm, well within the VC8's compatible range. All 8 cells in this bundle can be charged simultaneously across the charger's 8 independent bays.
Note: The P28A's rated standard charge current is 2.8A. The VC8 can approach that with a single slot selected (up to 3A), while charging all 8 slots at once defaults to a gentler 0.5A per slot.
What's Included
- Molicel INR18650-P28A Flat Top Battery × 8
- XTAR VC8 Charger × 1
- USB-A to 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 XTAR VC8
- The P28A 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
FAQ
Q: Can the XTAR VC8 charge Molicel P28A Flat Top batteries safely? A: Yes. The VC8 automatically detects Li-ion chemistry and applies the correct charging voltage (4.2V) and current for P28A cells, with independent monitoring on each of its 8 slots.
Q: Can I charge all 8 batteries at the same time? A: Yes. The VC8 has 8 independent slots. At the default automatic setting, all 8 can charge simultaneously at up to 0.5A per slot; manually selecting a higher current level will use fewer slots at once (e.g., 3A on 1 slot, 2A on 2 slots, or 1A on 4 slots).
Q: Will Flat Top batteries sit properly in the VC8 charger slots? A: Yes. The VC8's slider-style contacts are designed to accommodate both Flat Top and Button Top cells without any adapter or modification.
Q: How do I test if a P28A battery has lost capacity? A: Use the VC8's Grading Mode on CH1–CH4. It runs a charge–discharge–charge cycle to measure true capacity, so you can identify batteries that no longer meet their rated mAh.
Q: Is 35A continuous discharge safe for everyday devices? A: No — the P28A 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: Does the VC8 require a special power adapter for fast charging? A: For the fastest speeds (2A/3A settings), a QC3.0-compatible USB-C adapter is required. Without QC3.0, charging current will be limited.
Q: How does the P28A compare to the P26A? A: Both share the same 35A discharge rating and low internal resistance, performing almost identically under heavy load. The P28A offers a bit more capacity (2800mAh vs. 2600mAh), giving slightly longer runtime in lower-power situations.
Q: What's in the box? A: 8 Molicel INR18650-P28A Flat Top batteries, 1 XTAR VC8 charger, a USB-A to USB-C charging cable, and a user manual.
