Tetevis RT50 Compatible Battery 7.4V 2050mAh Li-ion
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Tetevis RT50 Compatible Battery 7.4V 2050mAh Li-ion - 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
⚠️ 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.
Tetevis RT50 Compatible Battery 7.4V 2050mAh Li-ion - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
2050mAh
Tetevis RT50 — 7.4V Li-ion Replacement Battery
This 7.4V, 2050mAh Li-ion battery fits the Tetevis RT50 two-way radio. It replaces the original pack when capacity has dropped or the cell has failed outright. Voltage and form factor match the RT50 battery bay directly.
- RT50 platform fit: The RT50 runs a 7.4V two-cell Li-ion architecture. This pack matches that voltage rail and the physical connector orientation, so the BMS handshake initiates correctly on first insertion without requiring any adapter or modification.
- Bench tested on actual hardware: We cycled this pack through PTT-heavy transmit loads and monitored BMS response at the current spikes typical of radio transmit events. The protection circuit held within expected thresholds and did not trip under sustained keying sequences.
- First insertion contact check: If the charger shows a fault LED on the first dock, remove the pack and wipe the contact pads with a dry cloth before reseating. New cells ship at storage voltage, and a dirty or oxidised contact can prevent the dock from reading the pack correctly on that initial cycle.
Why the RT50 cuts out mid-transmission on a new battery
When you key the RT50, transmit current spikes sharply — often two to three times the standby draw. A new pack sitting at storage voltage (typically around 3.6–3.7V per cell) has less headroom before the BMS interprets that spike as an overcurrent event. The protection circuit trips and the radio drops out mid-transmission. This is not a faulty pack. Run two or three full charge cycles and the cells stabilise at their working voltage, giving the BMS the headroom it needs to pass the transmit surge without cutting off.
Bar indicator showing one fewer bar than expected after fitting this pack
The RT50 reads battery level from resting voltage thresholds — it has no chip tracking charge history. A new cell at storage voltage sits below the top threshold the radio expects from a fully charged pack, so the indicator shows one bar short even though nothing is wrong. Charge the pack fully before drawing conclusions. Once the cell reaches its rated 7.4V resting voltage after a complete charge cycle, the bar indicator will read correctly.
Compatible Models
Technical Specifications
Product Highlights
- Brand: Tetevis
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My RT50 cuts out the moment I press PTT — is the new battery dead?
It is not dead. The transmit current spike on the RT50 is high enough that a pack at storage voltage can trigger the BMS overcurrent cutoff before the cell has had a chance to fully charge. This is a storage-voltage issue, not a failed cell. Charge the pack completely and run two full cycles — once the cells are at working voltage the BMS will pass the transmit surge without dropping out.
The charger dock is flashing a fault LED and won't start charging — what's wrong?
New packs ship at storage voltage, which can sit below the minimum acceptance threshold some charger docks require before they begin a charge cycle. Remove the pack, wipe the gold contact pads on both the battery and the dock with a dry cloth, and reseat firmly. If the fault LED persists, check that the dock voltage input is stable — a low mains supply can cause the same symptom. The dock needs to read at least 3.0V per cell to accept the pack and begin charging.
The RT50 drops to noticeably weaker audio and TX power partway through a long shift — is this voltage sag?
Yes. Under sustained RF output, cell voltage sags below the radio's optimum operating range, and the RT50 reduces transmit power to protect the circuit. This happens faster if the pack has not completed its first few full charge cycles, or if ambient temperature is low. It is not a fault with the cell. Keep the pack topped up between shifts rather than running it to the first bar — sustained operation above 7.0V resting voltage keeps sag within the radio's tolerance.
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