GP88 Battery Replacement Guide: HNN9628 NiMH Options

The GP88 battery (specifically the HNN9628 series) remains a critical component for maintaining legacy Motorola Radius radio fleets, even as the broader market shifts toward Digital Mobile Radio (DMR) and LTE-hybrid systems. Mordorintelligence Power-Time

Core Product Insights

* Chemistry & Capacity: Modern replacements have largely transitioned from Nickel-Cadmium (NiCd) to Nickel-Metal Hydride (NiMH), offering capacities between 1200 mAh and 2700 mAh at 7.5V. Batteryuniverse Battery-Ph

* Legacy Lifespan: While the Motorola GP88 is a legacy analog radio, there is a steady demand for high-capacity NiMH batteries to extend the utility of existing equipment in cost-sensitive sectors like small-scale security and logistics. Mordorintelligence

* Compatibility: The battery form factor is highly versatile, supporting models including the GP300, GP600, GTX800, GTX900, and PTX600. Battery-Ph Walmart

Market Trends (2026 Outlook)

* Stable Growth: The global two-way radio market is projected to reach $14.11 billion by 2031, driven by infrastructure and public safety demands. Mordorintelligence

* User Pain Points: The "Memory Effect" remains the primary failure mode for GP88 users who do not fully discharge NiMH batteries before recharging. Mordorintelligence

* Safety & Generic Risks: The market is flooded with low-cost generic replacements that often lack overcharge protection or use "virtual capacity" labeling (actual capacity being lower than advertised). Mordorintelligence Power-Time

I have identified several high-quality replacement options and wholesale suppliers available for current sourcing needs. The attached files provide detailed technical comparisons and pricing for HNN9628 compatible units.

Gp88 Battery

Overview

Core Product Insights

Market Trends (2026 Outlook)

Motorola Gp88 Replacement Battery 7.5v Nimh High Capacity

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Sources & References