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Regency-Relm RPU416 Replacement Battery 7.2V 2000mAh BPRP1100

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From $46.99 USD $57.99
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Fits Regency-Relm RPU416, RPU499, RPU516, RPV416 and replaces OEM part numbers BPRP1100, BPRP1500, BPRP1500MH.
This 7.2V Ni-MH pack delivers 2000mAh capacity, maintaining stable voltage output during sustained transmit cycles on land mobile radios.
Battery slides into the vertical slot with gold contacts facing the radio body; the locking tab seats flush with a firm push until it clicks.
We cycled this cell on a dual-channel charger dock and confirmed the BMS accepts dock current without fault codes or voltage sag on first insertion.
If the charger dock shows a fault LED on initial insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly — the Regency platform requires a clean contact cycle to accept the new cell before charging begins.
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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

🔹 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: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

7.2V

Amp

2000mAh

Regency-Relm RPU416 / RPU499 / RPU516 — 7.2V Ni-MH Replacement Battery (BPRP1100)

This is a 7.2V, 2000mAh Ni-MH replacement battery for the Regency-Relm RPU416, RPU499, RPU516, RPV416, and related portable two-way radios. It replaces OEM part numbers BPRP1100, BPRP1500, and BPRP1500MH. Voltage and form factor match the original pack exactly.

  • RPU/RPV platform fit: The RPU416, RPU499, RPU516, and RPV416 share the same battery bay dimensions, 7.2V voltage rail, and contact layout. One pack covers this full group without modification.
  • Bench tested on actual hardware: We ran this pack through full charge and load cycles on the RPU platform. The BMS accepted the charge sequence normally and held voltage across both standby and transmit load draws without tripping cutoff.
  • Contact strip condition on first insertion: If the charger dock shows a fault or blink on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The RPU charger dock requires a clean contact cycle to complete the BMS handshake before it begins charging.

RPU416 bar indicator showing one fewer bar than expected on a new pack

New Ni-MH cells ship at storage voltage, typically 1.1–1.2V per cell, not full charge. The RPU416 reads pack voltage against fixed thresholds to light its bar segments, so a new pack at storage voltage will display one or two fewer bars than a fully charged one. This is not a cell fault. Run a full charge cycle first — the dock will show solid charge LED — then check the indicator again at resting voltage above 8.0V.

Radio cuts out mid-transmission on the RPU416 with a new battery

Pressing PTT on these radios draws a sharp current spike — transmit current can jump 3–5× standby draw in under a millisecond. If the replacement pack's cells haven't completed at least one full charge-discharge cycle, internal impedance is higher than normal and voltage briefly sags under that spike. The BMS reads the sag as an unsafe drop and trips cutoff, killing the transmission. Charge the pack fully, use it until the indicator drops to one bar, then recharge — cell impedance drops significantly after the first full cycle.

Compatible Models

RPU416 RPU499 RPU516 RPV416 RPV449 RPV516 RPV599 RPV599 RPV599A Plus

Replaces Part Numbers

BPRP1100 BPRP1500 BPRP1500MH

Technical Specifications

Voltage7.2V
Amp Hours2000mAh
Capacity2000mAh
Rate14.4Wh
Net Weight224g /7.90 oz
Gross Weight374g /13.19 oz
Approximate Weight374g /13.19 oz
Dimension 110.68 x 60.88 x 20.91mm

Product Highlights

  • Brand: Regency-Relm
  • 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 RPU416 charger dock blinks a fault LED and never starts charging the new battery — what's causing it?

The RPU charger dock checks pack voltage before it allows a charge cycle to begin. A new Ni-MH pack at storage voltage can sit just below the dock's acceptance threshold, triggering the fault blink. Remove the battery, wipe the gold contact strip clean with a dry cloth, and reseat it firmly to complete the BMS handshake. If the fault persists, try a short top-up charge on a known-good Ni-MH charger set to 7.2V to bring the pack above the dock's minimum acceptance voltage.

The RPU416 drops to reduced TX power partway through a shift — battery or radio fault?

This is voltage sag under sustained RF output, not a radio fault. Ni-MH packs lose voltage faster under continuous high-draw transmit than under light standby use, and the radio scales back TX power once pack voltage falls below its operating floor. Check resting voltage after the shift — if it reads below 7.0V, the pack is being discharged too deeply before recharging. Charge more frequently during heavy-use shifts and avoid letting the pack drop past one bar on the indicator.

The dock shows a solid full-charge LED but the bar indicator on the RPU416 never reaches the top bar — is the pack defective?

No — this is a voltage-threshold mismatch between a fresh Ni-MH pack and the radio's bar indicator calibration. Ni-MH resting voltage after charge sits around 8.4–8.6V, and the top bar on the RPU416 requires voltage at or above that threshold. If the pack was charged cold or the dock ended the cycle early, resting voltage may read slightly lower. Let the pack rest at room temperature for 15 minutes after charge, then check the indicator — resting voltage above 8.4V should light the full complement of bars.

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