Uniden 24-148 Replacement Battery 3.6V 700mAh BT-800
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Uniden 24-148 Replacement Battery 3.6V 700mAh BT-800 - 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.
Uniden 24-148 Replacement Battery 3.6V 700mAh BT-800 - is backordered and will ship as soon as it is back in stock.
Voltage
3.6V
Amp
700mAh
Uniden 24-148 / AE255 Series — 3.6V Ni-MH Replacement Battery (BT-800)
This is a 3.6V, 700mAh Ni-MH battery that fits the Uniden 24-148, AE255, and a wide range of compatible Uniden cordless handsets. It replaces OEM part numbers BT-800, BT-905, BBTY0300001, BBTY0444001, and BBTY0449001. The cell size and connector match the original pack directly.
- Uniden 24-148 and AE255 platform fit: These models share the same 3.6V single-cell NiMH pack format, connector pitch, and BMS handshake with the base station charging circuit. One battery part number covers the full cluster because the charge termination voltage and cell geometry are identical across the lineup.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a Uniden handset base. The base station accepted the cell immediately, charge current ramped normally, and the BMS hit negative delta-V cutoff cleanly at full capacity.
- First charge after installation: Place the handset in the base for a full 16 hours before first use. NiMH cordless phone batteries need a slow initial charge to reach rated capacity — pulling the handset off the base early on the first cycle will leave the cells under-conditioned and talk time will read short.
Base station charge light not activating on a new NiMH pack
NiMH batteries self-discharge in storage. If the cell voltage drops far enough, the Uniden base station charging circuit may not recognise the pack as a valid load and will skip the charge cycle entirely. This is a voltage-threshold issue, not a fault with the battery or the base. The fix is a short trickle-charge nudge — place the handset in the base, leave it undisturbed for two to four hours, and the circuit will typically pick up the rising cell voltage and switch to normal charge mode. If the charge light still does not activate, check that the handset contacts are clean and fully seated against the base pins.
Talk time shorter than original battery after replacement
New NiMH cells often deliver below-rated capacity for the first three to five full charge and discharge cycles. This is a chemistry characteristic, not a defect — the crystalline structure inside the cell needs cycling to reach full capacity. Run the handset until the low-battery indicator activates, return it to the base for a full charge, and repeat. By cycle four or five, talk time should be at or close to the 700mAh rated capacity.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Uniden
- 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 Uniden handset lost its pairing with the base after I swapped the battery — how do I get it back?
Removing the battery cuts power completely, and some Uniden DECT handsets drop their base registration when power is lost. Re-pair by pressing the page or find button on the base unit while the handset is powered on — the handset will prompt you to register. If the handset shows no response, confirm the new battery has had at least two hours on charge first, as a very low cell voltage can prevent the DECT radio from initialising fully.
The handset shows full charge but the battery drains completely overnight even when it's sitting on the base — what's wrong?
This is a standby draw issue, not a capacity fault. Check that the handset is fully seated in the base cradle — if the charging contacts are not making solid contact, the handset runs on battery power in standby rather than drawing from the base. Clean the contacts on both the handset and the base with a dry cloth, press the handset firmly into the cradle, and confirm the charge indicator activates. A handset that sits slightly off-centre in a worn cradle will drain a new 700mAh pack overnight.
After the battery swap, range dropped noticeably and calls break up at distances that used to be fine — is this the battery?
Yes, this is a battery-related symptom. The Uniden DECT transmitter draws a short burst of higher current each time it sends a radio packet. If the NiMH cell voltage sags under that RF load — common in the first few cycles before the cells are conditioned — the transmit power drops and range suffers. Run three to five full charge and discharge cycles to condition the cells, and range should recover as the internal resistance of the pack falls. If break-up persists after five cycles, check that the battery voltage under load reads above 3.2V with a multimeter.
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