Midland G-28 Compatible Battery 7.2V 700mAh Ni-MH 20-555
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Midland G-28 Compatible Battery 7.2V 700mAh Ni-MH 20-555 - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Midland G-28 Compatible Battery 7.2V 700mAh Ni-MH 20-555 - is backordered and will ship as soon as it is back in stock.
Voltage
7.2V
Amp
700mAh
Midland G-28 / G-30 — 7.2V Ni-MH Replacement Battery (20-555)
This is a 7.2V, 700mAh Ni-MH replacement battery for the Midland G-28 and G-30 handheld two-way radios. It uses OEM part number 20-555 and fits directly into the battery compartment on both models. Voltage and capacity match the original Midland specification.
- G-28 and G-30 compatibility: Both radios share the same battery bay dimensions, contact arrangement, and 7.2V supply rail. One battery fits both units without adapters or modifications.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the G-28 platform. The BMS held stable voltage under PTT transmit current spikes without tripping into protection mode.
- First insertion after storage: Ni-MH cells ship at partial charge. If the radio powers on but shows only one bar, place it on charge immediately — do not key up and transmit at full power until the first charge cycle completes. Transmitting at low cell voltage accelerates early capacity fade in Ni-MH chemistry.
Why the G-28 cuts out mid-transmission on a freshly inserted battery
Ni-MH cells at storage voltage sit around 1.1–1.2V per cell. Under PTT transmit load, that voltage sags sharply. The G-28's low-voltage cutoff circuit reads that sag as a depleted pack and drops the RF output or shuts transmission entirely. This is not a faulty battery — it is the protection circuit doing its job on an uncharged cell. Charge the pack fully before the first transmission and the cutout behaviour stops.
Bar indicator stuck on one bar after a full overnight charge
The G-28 uses a simple voltage-threshold bar indicator — it reads resting cell voltage and maps that to bars on the display. A new Ni-MH pack that has never been cycled can show a suppressed resting voltage even after a full charge, because the cells need one or two complete charge-discharge cycles to reach their rated capacity. Remove the battery, leave it out for two minutes, and reinsert it. If the indicator still reads low after a second full charge cycle, check that the contact strip on the battery is clean and making firm contact with the radio's terminal plate.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Midland
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Ni-MH
- Battery Type: Ni-MH
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My G-28 drops out every time I press PTT — is the new battery already dead?
It is not dead. Ni-MH cells ship at partial storage voltage, and the G-28's low-voltage protection circuit cuts transmission when cell voltage sags under transmit load. Charge the pack fully before keying up. After a complete charge cycle, resting voltage should sit at or above 8.4V and the cutout stops.
The charger LED blinks and never clears after I insert the new 20-555 pack — what's wrong?
A new Ni-MH pack at storage voltage can sit below the dock's acceptance threshold, causing the charger to fault rather than begin a charge cycle. Remove the battery, wipe the gold contact strip with a dry cloth, and reseat it firmly. If the LED still blinks, leave the pack on the dock for 10–15 minutes — some chargers run a trickle pre-charge to bring the cell voltage up to acceptance level before switching to normal charge current.
The G-28 transmits fine for a while, then the signal gets weak mid-shift — what causes that?
This is voltage sag under sustained RF output, not a sudden failure. As the Ni-MH cells discharge, internal impedance rises and the voltage delivered under transmit load drops below the radio's full-power threshold. The radio then reduces TX output to protect the circuit. Swap to a freshly charged pack to restore full transmit power, and charge the depleted pack before the next use.
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