Max MPHD35K37SS2 – High Density Semi-Solid Battery cell| 3.7V High Nickel Ternary 350WH/KG | 35,000 mAh

Max MPHD35K37SS2 – High Density Semi-Solid Battery cell| 3.7V High Nickel Ternary 350WH/KG | 35,000 mAh

“The highest energy density in the entire lineup — 350WH/KG, delivering the same 129.5Wh as the 320WH/KG 35,000mAh in a cell 25g lighter and 1.2mm thinner.”

The Max 3.7V High Nickel Ternary 350WH/KG 35,000mAh is the entry cell of the Max 350WH/KG series and the highest energy density cell in the entire Volt, Prime, and Max lineup. At 9.8mm and 385g in the 87×187mm footprint, it stores 129.5Wh — the same energy as the Max 320WH/KG 35,000mAh, but 25g lighter and 1.2mm thinner. Against the Max 320WH/KG 32,000mAh — which stores less energy at 118.4Wh — it delivers 9.4% more energy at only 5g more weight and 0.8mm less thickness. Against every Prime and Volt cell in the 87×187mm footprint, it stores more energy while being lighter and thinner simultaneously. The 350WH/KG platform is described by the manufacturer as achieving the highest energy density of any cell in the semi-solid lineup, enabled by new high specific capacitance electrode materials and advanced packaging technology. It charges at 1C (35A, ~60 minutes), runs 3C continuous (105A) and 5C peak (175A), consistent with the Max series rate architecture. Precision-manufactured using high-precision automated electrode preparation, stacking, and encapsulation for consistent internal structure and reliable field performance across every production batch.

Description

The Max 3.7V High Nickel Ternary 350WH/KG 35,000mAh is the highest energy density cell in the lineup, delivering 129.5Wh at 350Wh/kg. It matches the 320WH/KG 35,000mAh in energy but is 25g lighter and 1.2mm thinner. Compared to the 32,000mAh version, it offers more energy with minimal size and weight increase. It supports 1C charging, 3C continuous, and 5C peak, using advanced high-density materials and semi-solid technology.

  • 350WH/KG — The Highest Energy Density in the Entire Lineup

The 350WH/KG platform is the highest gravimetric energy density of any cell across all four series — Volt, Prime, Max 320WH/KG, and Max 350WH/KG. It is 9.4% above the Max 320WH/KG platform, 25.0% above the Prime HN Ternary 280WH/KG platform, 45.8% above the Volt HV Li-Co 240WH/KG platform, and 75.0% above the Volt Ternary/LCO 200WH/KG baseline. The manufacturer describes it as achieving the highest energy density of any cell in the semi-solid product range, enabled by new high-specific-capacitance electrode materials and advanced packaging technology that go beyond what the 320WH/KG formulation delivers.

  • Same Energy as the 320WH/KG 35,000mAh — 25g Lighter, 1.2mm Thinner

The Max 320WH/KG 35,000mAh stores 129.5Wh in 410g at 11.0mm. The Max 350WH/KG 35,000mAh stores 129.5Wh in 385g at 9.8mm — identical stored energy, 25g lighter, 1.2mm thinner, in the same 87×187mm bay. This is the most direct expression of what 350WH/KG delivers over 320WH/KG at the same capacity: not more energy, but the same energy in a physically smaller, lighter cell. For any platform where the 129.5Wh energy level is the target and weight or thickness reduction in the 87×187mm bay is the remaining constraint, the 350WH/KG 35,000mAh is the correct choice over the 320WH/KG 35,000mAh.

  • More Energy Than the Max 320WH/KG 32,000mAh — 5g Heavier, 0.8mm Thinner

The Max 320WH/KG 32,000mAh stores 118.4Wh in 380g at 10.6mm. The Max 350WH/KG 35,000mAh stores 129.5Wh in 385g at 9.8mm — 9.4% more energy for 5g more weight and 0.8mm less thickness. The 350WH/KG 35,000mAh is simultaneously higher energy and physically thinner than the 320WH/KG cell directly below it in capacity — a consequence of the higher energy density distributing 35,000mAh of cell material more efficiently across the 87×187mm planar area. For operators evaluating both Max 320WH/KG and 350WH/KG cells, this comparison defines the entry point to the 350WH/KG tier: near-identical weight to the 320WH/KG 32,000mAh, thinner, and 9.4% more energy.

  • 9.8mm — The Thinnest High-Energy Cell in the 87×187mm Footprint

At 9.8mm, the Max 350WH/KG 35,000mAh is the thinnest cell in the 87×187mm footprint that stores 129.5Wh. The Max 320WH/KG 35,000mAh stores the same energy at 11.0mm — 1.2mm thicker. The Prime HN Ternary 30,000mAh, storing 111.0Wh, is 10.8mm. The Prime SHV LCO 28,000mAh, storing 110.6Wh, is 11.3mm. At 9.8mm, the 350WH/KG 35,000mAh matches the thickness of the Prime HN Ternary 27,000mAh — a cell storing only 99.9Wh — while storing 29.6% more energy at only 20g more weight. For drone platforms with an 87×187mm bay where depth constraint is the binding physical limitation alongside maximum energy requirement, this is the definitive cell.

  • 16.7% More Energy Than the Prime HN Ternary 30,000mAh — 21g Lighter, 1.0mm Thinner

The Prime HN Ternary 30,000mAh stores 111.0Wh in 406g at 10.8mm — the highest-energy 280WH/KG cell in the 87×187mm footprint. The Max 350WH/KG 35,000mAh stores 129.5Wh in 385g at 9.8mm — 16.7% more energy, 21g lighter, and 1.0mm thinner. All three metrics move in the same direction simultaneously. The 350WH/KG platform’s advantage over 280WH/KG at this footprint is not incremental — it is a categorical step that improves energy, weight, and thickness together.

  • The 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. This goes beyond the electrode formulation of the 320WH/KG platform, delivering greater energy storage per unit weight through a more advanced cathode material system. 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. Rate balance optimisation — precisely designed material ratios balancing energy density and rate performance — ensures the 3C / 5C discharge profile remains practically useful for commercial drone applications despite the step up in energy density.

  • 5C Peak — 175A, 3C Continuous — 105A

The Max 350WH/KG 35,000mAh delivers 175A peak burst and 105A continuous — identical to the Max 320WH/KG 35,000mAh at the same capacity. The rate profile is consistent across both 35,000mAh Max cells and across the entire Max series: 1C charge, 3C continuous, 5C peak. For mapping, logistics, emergency response, and fire-fighting UAVs where motor loads during cruise and standard operations fall within the 3C/105A continuous range and peak events do not exceed 5C/175A, this profile is appropriate for the endurance-first mission architecture both Max series cells are designed to serve.

  • 1C Charge — 35A Input, ~60 Min Full Charge

Standard 1C continuous charge delivers 35A input, fully charging the cell in approximately 60 minutes — identical charge behaviour to the Max 320WH/KG 35,000mAh. 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 this platform delivers.

  • 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 the 350WH/KG energy density level — the highest in the lineup — manufacturing precision in electrode preparation and internal layer alignment is the direct determinant of both peak energy density realisation and the long-term safety behaviour of the cell across its operational service life.

Core Specifications

Parameter Value
Series Max
Product Type High Density Semi-Solid Battery Cell
Material System 3.7V High Nickel Ternary — 350WH/KG
Nominal Voltage 3.7V
Capacity 35,000 mAh (35Ah)
Continuous Charge Rate 1C (35A)
Continuous Discharge Rate 3C (105A)
Peak Discharge Rate 5C (175A)
Dimensions (W×L) 87 × 187 mm
Thickness 9.8 mm
Weight 385g (±5%) — 366g to 404g
Cell Form Factor Soft Pack / Pouch Cell
Cell Technology Semi-Solid — New High Specific Capacitance Electrode
Chemistry High Nickel Ternary
Nominal Energy 129.5 Wh
Energy Density 350 WH/KG
Full Charge Time ~60 min (at 1C)

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

Capacity Dimensions (W×L) Thickness Weight Energy Cont. Discharge Peak Charge
35,000 mAh ✅ 87×187 mm 9.8 mm 385g 129.5 Wh 3C / 105A 5C / 175A 1C
40,000 mAh 87×187 mm 10.8 mm 430g 148.0 Wh 3C / 120A 5C / 200A 1C

Why Choose the 350WH/KG 35,000 mAh

Reason Detail
Highest energy density in the entire lineup 350WH/KG — the peak of the entire Volt, Prime, and Max series
Same energy as 320WH/KG 35,000mAh — 25g lighter, 1.2mm thinner 129.5Wh in 385g at 9.8mm vs 129.5Wh in 410g at 11.0mm — same energy, less weight, thinner
More energy than Max 320WH/KG 32,000mAh — 5g heavier, 0.8mm thinner 129.5Wh vs 118.4Wh — higher energy, thinner, near-identical weight
16.7% more energy than Prime HN Ternary 30,000mAh — 21g lighter, 1.0mm thinner All three metrics simultaneously in favour
Thinnest 129.5Wh cell in the 87×187mm format 9.8mm — 1.2mm thinner than the only other cell storing this energy in this footprint
Entry to the 350WH/KG platform Lowest weight and thinnest profile in the Max 350WH/KG family

Same Footprint — All 87×187mm Cells Compared

Max 350 35,000mAh ✅ Max 320 35,000mAh Max 350 40,000mAh Max 320 32,000mAh Prime HN Ternary 30,000mAh Prime SHV LCO 28,000mAh
Energy Density 350 WH/KG 320 WH/KG 350 WH/KG 320 WH/KG 280 WH/KG 280 WH/KG
Capacity 35,000 mAh 35,000 mAh 40,000 mAh 32,000 mAh 30,000 mAh 28,000 mAh
Thickness 9.8 mm 11.0 mm 10.8 mm 10.6 mm 10.8 mm 11.3 mm
Weight 385g 410g 430g 380g 406g 410g
Energy 129.5 Wh 129.5 Wh 148.0 Wh 118.4 Wh 111.0 Wh 110.6 Wh
Cont. Discharge 3C / 105A 3C / 105A 3C / 120A 3C / 96A 5C / 150A 5C / 140A
Peak Discharge 5C / 175A 5C / 175A 5C / 200A 5C / 160A 10C / 300A 10C / 280A
Charge Rate 1C / 35A 1C / 35A 1C / 40A 1C / 32A 1C / 30A 2C / 56A
Charge Time ~60 min ~60 min ~60 min ~60 min ~60 min ~30 min
Cell Technology Semi-Solid Semi-Solid Semi-Solid Semi-Solid Semi-Solid Semi-Solid
Best For Highest density, lightest 129.5Wh Same energy, 320WH/KG platform Maximum 350WH/KG endurance Entry to Max 87×187mm, 320WH/KG Higher rate, 280WH/KG 2C charge, 3.95V platform

Ideal Applications

Application Why This Cell Fits
Maximum endurance mapping & survey drones 350WH/KG — the highest available energy density for the longest endurance per gram in the 87×187mm format
Weight-critical long-range logistics UAVs 129.5Wh at 385g — the lightest cell storing this energy level in the 87×187mm footprint by 25g
Thin-bay 87×187mm platforms 9.8mm — the thinnest cell in this footprint at the 129.5Wh energy tier, fitting bays the 320WH/KG 35,000mAh cannot
Max 320WH/KG 35,000mAh replacement Same 87×187mm bay, same energy — 25g lighter and 1.2mm thinner
Emergency response and fire-fighting UAVs Semi-solid construction at the highest available energy density for the longest possible on-station operations
Max 350WH/KG fleet entry point Lowest weight and thinnest profile in the 350WH/KG family — entry to the highest density tier in the lineup

Additional information

Battery Type

Semi-Solid

Capacity

30,000 – 40,000 mAh

Voltage

3.7V

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