Description

The Max 3.7V High Nickel Ternary 40,000mAh is the highest-energy cell in the 87×187mm format, delivering 148Wh at 350Wh/kg. It matches the only other 148Wh cell (from the Prime series) but in a smaller, lighter package—430g vs 578g. Compared to the 35,000mAh version, it offers 14.3% more energy and higher peak output (200A). It supports 1C charging, 3C continuous, and 5C peak, using advanced high-density materials and semi-solid technology for top performance.

• 350WH/KG — 148.0Wh, The Highest Stored Energy in the 87×187mm Footprint

The 350WH/KG platform delivers 148.0Wh in the 87×187mm footprint — the highest stored energy of any cell in this format across all four series. The Max 320WH/KG 35,000mAh, the previous energy ceiling of the 87×187mm format, stores 129.5Wh. The Prime HN Ternary 30,000mAh stores 111.0Wh. The Prime SHV LCO 28,000mAh stores 110.6Wh. The Max 350WH/KG 40,000mAh stores more energy than all of them — 14.3% more than the nearest competitor in this footprint — at the highest energy density achievable in the semi-solid cell category.

• 148g Lighter Than the Only Other 148.0Wh Cell — In a Smaller Footprint

The Prime HN Ternary 40,000mAh is the only other cell in the entire Volt, Prime, and Max catalog that stores 148.0Wh. It does so in a 105×230mm footprint at 578g. The Max 350WH/KG 40,000mAh stores the same 148.0Wh in an 87×187mm footprint at 430g — 148g lighter in a bay 18mm narrower and 43mm shorter. For any drone platform built around the 87×187mm bay that needs 148.0Wh of stored energy, the Max 350WH/KG 40,000mAh is the only cell in the catalog that delivers it at this footprint. The Prime HN Ternary 40,000mAh requires a fundamentally different, larger frame design. The Max 350WH/KG 40,000mAh does not.

• Same Thickness as the Prime HN Ternary 30,000mAh — 33.3% More Energy

The Prime HN Ternary 30,000mAh measures 10.8mm in the 87×187mm footprint and stores 111.0Wh at 406g. The Max 350WH/KG 40,000mAh also measures 10.8mm in the same footprint and stores 148.0Wh at 430g — 33.3% more energy for 24g more weight at identical thickness. For any platform where the 87×187mm bay depth accommodates 10.8mm, the Max 350WH/KG 40,000mAh delivers a third more energy than the Prime HN Ternary 30,000mAh without requiring any additional bay depth.

• 30g Lighter Than the Volt HV Li-Co 28,000mAh — 39.1% More Energy

The Volt HV Li-Co 28,000mAh stores 106.4Wh in 460g at 11.6mm with a 25C/700A peak. The Max 350WH/KG 40,000mAh stores 148.0Wh in 430g at 10.8mm — 30g lighter, 0.8mm thinner, and 39.1% more energy. The only specification where the Volt HV Li-Co 28,000mAh leads is peak discharge: 25C/700A versus the Max’s 5C/200A. For endurance platforms where 700A burst is not required and maximum energy per gram in the 87×187mm bay is the objective, the Max 350WH/KG 40,000mAh is a lighter, thinner, more energy-dense, and structurally safer replacement in the same frame bay.

• 14.3% More Energy Than the Max 350WH/KG 35,000mAh — Final 87×187mm Step-Up

Stepping up from the 350WH/KG 35,000mAh adds 18.5Wh of stored energy (+14.3%) and increases peak burst from 175A to 200A (+14.3%) for 45g of additional weight and 1.0mm of additional thickness — all within the same 87×187mm footprint. This is the final capacity step within the Max 350WH/KG family. For operators already on the 350WH/KG platform who need the maximum endurance it delivers in the 87×187mm bay, the 40,000mAh is the definitive endpoint with no frame modification required.

• The Flagship of the Entire Catalog — Maximum Across Every Headline Metric at This Footprint

The Max 350WH/KG 40,000mAh is the definitive energy flagship of the entire Midlands Power cell catalog within the 87×187mm format: highest stored energy (148.0Wh), highest energy density (350WH/KG), highest peak current (200A), and highest continuous output (120A) of any cell in the 87×187mm footprint. It represents the furthest point the 3.7V semi-solid High Nickel Ternary chemistry reaches within this bay size — the cell against which every other 87×187mm cell is measured as a step down.

• 350WH/KG Technology — New High Specific Capacitance Electrode Materials

The Max 350WH/KG series achieves its energy density through new high specific capacitance electrode materials and advanced packaging technology — described by the manufacturer as the highest energy density achievable in the semi-solid cell category. Rate balance optimisation, through precisely designed material ratios, balances the 350WH/KG energy density with the 3C / 5C rate profile — ensuring the cell remains practically useful for commercial drone operations despite operating at the absolute frontier of semi-solid energy density. Optimised ionic conduction and reaction kinetics ensure the power demands of mapping, logistics, emergency response, and fire-fighting operations are met consistently across the full discharge curve. The semi-solid electrolyte construction reduces liquid electrolyte content versus conventional LiPo construction, providing lower risk of liquid leakage and fire, greater mechanical stability under vibration and impact loads, and more consistent internal geometry across the cell’s operational life.

• 5C Peak — 200A, 3C Continuous — 120A

The Max 350WH/KG 40,000mAh delivers 200A peak burst and 120A continuous — the highest peak and continuous outputs of any cell in the Max 350WH/KG family and the highest peak output of any Max series cell across both the 320WH/KG and 350WH/KG tiers. For mapping, logistics, emergency response, and fire-fighting UAVs where motor loads fall within the 3C/120A continuous range and peak events do not exceed 5C/200A, this profile is entirely appropriate for the endurance-first mission architecture this cell defines.

• 1C Charge — 40A Input, ~60 Min Full Charge

Standard 1C continuous charge delivers 40A input — the highest absolute charge current of any cell in the Max 350WH/KG family — fully charging the cell in approximately 60 minutes. Consistent with every cell in the Max series across both 320WH/KG and 350WH/KG tiers. Three cells in rotation at 1C sustain continuous field operations at the maximum endurance level the 350WH/KG platform delivers at the 87×187mm footprint.

• High-Precision Manufacturing — Electrode Preparation, Stacking, and Encapsulation

Automated, high-precision electrode preparation combined with advanced stacking and encapsulation technique ensures consistent internal structure and reduces performance fluctuations across every production batch. At 148.0Wh and 350WH/KG — the energy and density ceiling of the entire catalog within this footprint — manufacturing precision in electrode preparation and internal layer alignment is the most demanding requirement in the Max series, directly determining peak energy density realisation, long-term safety behaviour, and production consistency at this absolute frontier.

Core Specifications

Max 3.7V High Nickel Ternary 350WH/KG — Full Capacity Family

Why Choose the 40,000 mAh

Same Footprint — All 87×187mm Cells Compared

Cross-Series Comparison — Same Stored Energy (148.0Wh)

Ideal Applications