Description

The first Ultra cell to sustain above 200A continuously — and the largest proportional energy step in the 43×128mm format. The 3.7V Ternary 5,200mAh delivers 234A continuous and 390A peak from a 116g, 9.2mm soft pack in the 43×128mm footprint — the mid-capacity cell that crosses the 200A continuous threshold for the first time in the entire Ultra lineup, and the only 43×128mm option at 9.2mm bay depth. Built for full-size FPV racing drones, RC cars, RC aircraft, and RC boats where the 4,000mAh’s 180A continuous ceiling is insufficient and the full 137g, 10.9mm of the 6,300mAh exceeds the platform’s weight or depth budget.

 

Key Specifications at a Glance

Why Choose the Midlands Power 5,200mAh Ultra Ternary Battery?

234A Continuous — The First Ultra Cell to Sustain Above 200A

At 45C continuous from 5,200mAh, this cell delivers 234A of sustained output — the first in the entire Ultra lineup to cross the 200A continuous threshold. Every Ultra cell before it peaks at 180A continuous. The 5,200mAh extends this by 54A in a single step, clearing the sustained current requirement that no smaller-format or lower-capacity Ultra cell can meet:

For motor and ESC configurations sustaining draws above 180A during extended full-size racing runs, the 5,200mAh is the entry point that clears this requirement — with the 6,300mAh still available above it if 284A continuous is needed.

 

390A Peak — Matching the Absolute Peak of the 34×96mm 3,000mAh From a Higher-Capacity Architecture

Advanced electrode material formulation and the 43×128mm geometry deliver 390A of instantaneous peak burst current at 75C — precisely matching the peak output of the 34×96mm 3,000mAh (130C × 3.0Ah = 390A), but through a fundamentally different architecture. Where the 34×96mm cell reaches 390A through an extreme 130C rating at 3.0Ah, the 5,200mAh reaches the same figure through a lower 75C rating at higher capacity — with 73% more stored energy and greater thermal headroom per unit of capacity:

For full-size racing platforms where 390A peak is the motor design requirement, the 5,200mAh delivers it within the larger, more energy-rich 43×128mm architecture.

 

30.0% More Energy Than the 4,000mAh — The Largest Proportional Step in the 43×128mm Format

Stepping from the 4,000mAh to the 5,200mAh adds 4.44Wh of stored energy (+30.0%) and raises peak burst from 300A to 390A (+90A) — the largest proportional energy gain of any step within the 43×128mm family, greater than the 5,200mAh to 6,300mAh step (+21.2%). Both steps compared:

For racing platforms where the 4,000mAh’s 14.80Wh is insufficient for the required mission duration, the 5,200mAh extends available energy by almost a third from the same frame bay.

 

19.24Wh — Highest Stored Energy in the Ultra Lineup at This Tier

At 19.24Wh, the 5,200mAh stores more energy than any Ultra cell across all formats and capacities up to this tier — 4.44Wh more than the 43×128mm 4,000mAh (14.80Wh) and 8.14Wh more than the 34×96mm 3,000mAh (11.10Wh). For FPV and racing platforms where longer run time within the 43×128mm bay is the primary performance variable alongside sustained current output, 19.24Wh is the largest energy reservoir available at the mid-capacity tier of this format.

 

The Only 43×128mm Cell at 9.2mm Depth

At 9.2mm, the 5,200mAh is the sole cell in the 43×128mm format fitting bays too shallow for the 6,300mAh (10.9mm) but beyond the 4,000mAh’s performance limits. For depth-constrained full-size builds where 7.2mm is insufficient and 10.9mm is unavailable, the 5,200mAh is the only option in this footprint — there is no alternative at this depth in the 43×128mm family.

 

Ceramic Separator and PVDF Electrode — Racing-Grade Construction

Industry-first ceramic separator and PVDF electrode construction deliver thermal resistance and structural integrity at the demanding output levels of full-size competitive racing. The ceramic separator maintains safety under 390A peak events across the 43×128mm electrode area. The PVDF binder sustains electrode structural integrity under the combined stress of 234A continuous discharge and 390A peak events through the full 128mm electrode length, contributing to long cycle life and consistent performance across hundreds of high-rate charge-discharge cycles.

 

Full 43×128mm Format Comparison

When the 5,200mAh Is the Right Choice

The 5,200mAh is the correct cell within the 43×128mm format when three conditions apply:

The 4,000mAh is insufficient — its 300A peak or 180A continuous does not meet the motor and ESC configuration’s requirements.

The 6,300mAh is too much — its 137g and 10.9mm exceed the platform’s weight or depth budget, or bay depth is available to 9.2mm but not 10.9mm.

Above 200A continuous is required — the 5,200mAh is the only cell in the 43×128mm format, and the only cell in the entire Ultra lineup below the 6,300mAh, that clears this threshold.

 

Stepping Up From the 4,000mAh

Moving from the 4,000mAh to the 5,200mAh in the same 43×128mm bay adds 4.44Wh of stored energy (+30.0%), raises peak burst from 300A to 390A (+90A), and raises continuous from 180A to 234A (+54A) — for 26g of additional weight and 2.0mm of additional thickness. No frame modification is required. This is the largest proportional energy and current gain available within the 43×128mm format from a single capacity step.

 

Charging: 2C / 10.4A — Full Charge in ~30 Minutes

The 2C continuous charge rate delivers 10.4A input, fully charging the cell in approximately 30 minutes. Running multiple cells in rotation at 2C sustains back-to-back racing sessions at the mid-range energy level of the 43×128mm format without interruption.

 

Ideal Applications

Full-size FPV racing drones requiring above 180A continuous — 234A sustained is the first Ultra cell crossing the 200A continuous threshold for full-size motor and ESC configurations.

RC cars with full-size trays requiring above 300A peak — 390A burst in the 43×128mm format, exceeding the 4,000mAh’s 300A ceiling at mid-capacity.

Large-scale RC aircraft — 19.24Wh at 116g in the 43×128mm bay, the highest energy at mid-capacity for larger fuselage compartments.

RC boats sustaining above 180A motor draw — 234A continuous handles the highest sustained motor loads at the mid-capacity tier of the 43×128mm format.

4,000mAh upgrade builds — same 43×128mm bay, 30.0% more energy, 90A more peak, 54A more continuous, for 26g and 2.0mm, no frame modification needed.

Depth-constrained 43×128mm builds — at 9.2mm, the only cell in this footprint fitting bays too shallow for the 6,300mAh but beyond the 4,000mAh’s performance limits.

 

Product Summary

The Midlands Power 3.7V Ternary 5,200mAh occupies the mid-capacity position of the 43×128mm format with a clear purpose: the largest proportional energy step in the family, the first Ultra cell sustaining above 200A continuously, and the only option at 9.2mm depth in this footprint. At 234A continuous, 390A peak, and 19.24Wh in 116g, it delivers everything the 4,000mAh cannot — without requiring the full 137g and 10.9mm of the 6,300mAh.

Series: Ultra | Chemistry: 3.7V Ternary | Construction: Ceramic separator / PVDF electrode | Form Factor: Soft Pack / Pouch Cell