The lightest, thinnest, and most energy-dense cell in the 43×128mm format. The 3.8V HV LCO 6,500mAh stores 24.70Wh at 247 Wh/kg in just 100g — 37g lighter, 1.9mm thinner, and 6% more energy than the 3.7V Ternary 6,300mAh in the same footprint. The entry point to the HV LCO long-range architecture in the 43×128mm bay, built for FPV cruisers, endurance RC aircraft, RC cars, and RC boats where energy density and weight savings define performance.

Key Specifications at a Glance

Why Choose the Midlands Power 6,500mAh HV LCO Ultra Battery?

37g Lighter Than the 3.7V Ternary 6,300mAh — More Energy and Thinner in the Same Bay

The HV LCO 6,500mAh and the 3.7V Ternary 6,300mAh share an identical 43×128mm footprint. The difference is striking on every physical metric simultaneously:

Lighter, thinner, and more energy — all three simultaneously, from the same bay. For any platform currently running the Ternary 6,300mAh where 472A peak and 284A continuous are not required, the HV LCO 6,500mAh is a direct drop-in upgrade with no frame modification needed.

247 Wh/kg — 45% More Energy Per Gram Than the 3.7V Ternary 6,300mAh

The 4.45V high-voltage charge ceiling — above both standard LCO (4.2V) and standard Ternary chemistry (~4.2V) — enables the HV LCO electrode structure to store significantly more energy per gram. At 247 Wh/kg, the 6,500mAh delivers 45% more energy per gram than the Ternary 6,300mAh (170 Wh/kg) in the identical footprint. In practical terms: the same 100g of HV LCO cell mass stores 24.70Wh, while 100g of Ternary 6,300mAh stores approximately 17.02Wh — 7.68Wh less. For large-frame FPV and RC platforms where battery weight trades directly against flight time, payload, or handling agility, this is the most energy-dense option in the 43×128mm format.

3.8V Platform — 0.1V Above the 3.7V Ternary Cells

The 3.8V nominal discharge platform sits 0.1V above every 3.7V Ternary cell in the Ultra lineup. For motor controllers, ESCs, and power systems calibrated to the HV LCO discharge profile, the elevated per-cell voltage delivers higher system efficiency and a more consistent pack voltage throughout the discharge curve. The 4.45V charge ceiling extends the usable voltage window further still, storing more energy per unit of electrode mass than any Ternary cell in this format.

Lightest and Thinnest HV LCO Option in the 43×128mm Format

At 100g and 9.0mm, the 6,500mAh is the lightest and thinnest entry in the HV LCO 43×128mm family — 35g lighter and 1.8mm thinner than the HV LCO 8,000mAh. For builds where bay depth is a constraint or where minimum cell weight is the priority, this is the starting point for the HV LCO long-range architecture in the 43×128mm footprint.

35C Peak / 228A, 20C Continuous / 130A — Long-Range Rate Architecture

The 35C peak and 20C continuous ratings reflect the HV LCO chemistry’s deliberate design: comprehensive, sustained performance for long-range operation rather than maximum instantaneous burst. For FPV cruisers, flying wings, distance RC cars, and endurance builds where the sustained motor draw operates within the 20C/130A continuous range, these ratings provide consistent and appropriate headroom throughout the extended discharge. For any build requiring above 228A peak or 130A continuous, the 3.7V Ternary cells in the same format are the correct specification match.

HV LCO vs. Ternary — The Architecture Trade-Off at 43×128mm

The choice between HV LCO and Ternary in the 43×128mm format is an application question, not a quality question.

Choose HV LCO 6,500mAh when: the platform is a long-range FPV cruiser, endurance flying wing, distance RC car run, or sustained-load RC boat where efficient energy delivery over extended operation defines performance — and where 228A peak and 130A continuous are sufficient for the motor and ESC configuration.

Choose 3.7V Ternary when: the platform is a burst-rate competitive racing build — FPV race gates, track racing, high-agility RC competition — where instantaneous peak current and maximum C-rating are the primary performance drivers.

Full 43×128mm Format Comparison — All Ultra Cells

Charging: 2C / 13A — Full Charge in ~30 Minutes

The 2C continuous charge rate delivers 13.0A input, fully charging the cell in approximately 30 minutes — consistent with all Ultra cells at the 2C charge rate. Running multiple cells in rotation at 2C supports continuous field operations at maximum energy.

Construction: World-Leading Stacking Technique at 4.45V

Precise internal electrode layer alignment across the full 43×128mm footprint is essential at the 4.45V high-voltage operating threshold. World-leading stacking technique — the same precision construction process used across the HV LCO cells in the Volt series — maintains consistent cell performance, safe operation under elevated electrochemical stress, and reliable energy delivery throughout the long-range discharge profile this cell is designed for.

Ideal Applications

Long-range FPV cruisers — 247 Wh/kg in the 43×128mm format, 37g lighter than any Ternary alternative, for the longest sustained range at minimum battery weight.

Endurance RC aircraft — 24.70Wh at 100g in the 43×128mm footprint, the maximum energy per gram available in this format for extended flight operations.

RC cars in distance or efficiency events — 3.8V platform at 130A continuous in a 100g cell, delivering higher energy density for long-run events where peak burst is secondary.

RC boats in endurance racing — 20C / 130A continuous sustained delivery at the highest energy density in the 43×128mm format.

Ternary 6,300mAh weight-reduction alternative — same 43×128mm bay, 37g lighter, more energy, 1.9mm thinner, if 228A peak is sufficient for the build.

Entry to the 43×128mm HV LCO long-range platform — the lightest and thinnest HV LCO option in this format and the starting point for energy-density-first builds in the 43×128mm bay.

Product Summary

The Midlands Power 3.8V HV LCO 6,500mAh opens the HV LCO architecture in the 43×128mm format as its lightest, thinnest, and most energy-dense cell relative to mass. At 247 Wh/kg in 100g, it is 37g lighter, 1.9mm thinner, and stores more energy than the Ternary 6,300mAh in the identical footprint — the clearest expression of the HV LCO energy density advantage in the Ultra lineup. For long-range and endurance builds in the 43×128mm bay, this is where the HV LCO architecture begins.

Series: Ultra | Chemistry: High Voltage Lithium Cobaltate | Form Factor: Soft Pack / Pouch Cell