V Tech 5838 Cordless Phone Replacement Battery 3.6V 300mAh
Check that your old battery model number and device model to match our description. This makes sure they work together.
We ship your order same day if you buy it before 4 PM EST.
V Tech 5838 Cordless Phone Replacement Battery 3.6V 300mAh - is backordered and will ship as soon as it is back in stock.
Let customers speak for us
Send Your Battery Photo
Expert Technician Help
Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.
POST YOUR BATTERY IMAGE
Product & Solutions Expert
✉ sales@batteryweb.com
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.
V Tech 5838 Cordless Phone Replacement Battery 3.6V 300mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.6V
Amp
300mAh
V Tech 5838 / 5865 / 5884 / 5890 Series — 3.6V Ni-MH Replacement Battery (80-5074-00-00)
This is a 3.6V, 300mAh Ni-MH rechargeable battery for V Tech cordless phone handsets. It replaces OEM part numbers 80-5074-00-00, 2422, and TL2615 across the 5838, 5865, 5884, 5890, and over 72 additional V Tech models. When the original pack no longer holds a charge, this is the direct cell-for-cell replacement.
- 5838 / 5865 / 5884 / 5890 compatibility: These models share the same 3.6V three-cell NiMH pack, connector pinout, and base station charging circuit. One battery fits all of them without modification.
- Bench tested on actual hardware: We cycled this pack on the 5838 handset platform. The base station's charge detection handshake accepted the battery immediately, and the BMS responded correctly to both trickle and fast-charge phases.
- First-charge protocol for NiMH handsets: After installing, seat the handset in the base and leave it undisturbed for a full 16 hours before first use. NiMH cells at storage charge cannot reach rated capacity on a short charge — the slow first cycle is what unlocks the full 300mAh.
Talk time shorter than original battery after replacement
New NiMH cells ship at partial charge and need three to five full charge-discharge cycles before they hit rated capacity. On cycle one, you may see noticeably shorter talk time — that is normal, not a fault. Each subsequent full cycle reconditions the cells and recovers more of the 300mAh rating. Run the handset until it signals low battery, return it to the base for a full charge, and repeat until talk time stabilises.
Base station showing no charge or error light on new pack
V Tech base stations check the incoming battery voltage before committing to a charge cycle. A pack that has sat in storage can drop low enough that the base rejects it as a fault condition. Remove the battery, let it sit at room temperature for 30 minutes, then reinsert and reseat the handset firmly — the base needs a solid contact to read voltage correctly. If the error persists, check the handset contacts with a cotton swab; oxidation on the gold pads blocks the handshake. A clean contact at 3.6V nominal is what the base needs to begin charging.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: V Tech
- Manufacturer: CS
- Series: Standard
- Color: Green
- Product Type: Ni-MH
- Battery Type: Ni-MH
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My VTech 5838 handset won't pair with the base after I swapped the battery — did I break something?
No. Some DECT cordless phones lose their pairing data when power is fully removed during a battery swap. On the 5838, press and hold the handset's page or find button while it is seated in the base to trigger re-registration. Check your handset label or the base for the exact pairing sequence — it takes under 60 seconds and restores full functionality.
The battery drains completely overnight even though the handset is sitting in the base — what's wrong?
This points to the handset not making a solid electrical connection with the base charging contacts, not a battery fault. Lift the handset out and check that both the handset and base contact pads are clean and free of dust or oxidation. A light wipe with a dry cloth is enough. Reseat the handset — you should hear or feel it click into the cradle — and confirm the charge indicator light activates within a few seconds.
The phone's range feels shorter after the battery swap than it did with the original pack — is the new battery too weak?
Range drops when the handset's RF transmitter pulls more current than the battery can supply without voltage sag. This is a conditioning issue, not a defect. NiMH cells have slightly higher internal resistance in the first few cycles, which causes the voltage to dip under RF load. Run three to five full charge-discharge cycles and the internal resistance drops — transmit power stabilises and range returns to normal.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Related Products
Engineered for Performance. Built to Last.
Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.
-
Up to 21% offNew arrival
BatteryWeb
DeTeWe Twinny Master Replacement Battery 3.6V 750mAh Ni-MH
0.18 lb
Sale priceFrom $23.99 USD Regular price $29.99Unit priceIn stock (60 units) -
-
Up to 21% offNew arrival
BatteryWeb
Schneider CP900 Cordless Phone Compatible Battery 3.6V 750mAh
0.18 lb
Sale priceFrom $23.99 USD Regular price $29.99Unit priceIn stock (60 units) -
-
Up to 21% offNew arrival
BatteryWeb
Tiptel DECT Line 660 Replacement Battery 3.6V 750mAh
0.18 lb
Sale priceFrom $23.99 USD Regular price $29.99Unit priceIn stock (60 units) -
-
Up to 21% offNew arrival
BatteryWeb
Bosch MS687 Cordless Phone Replacement Battery 3.6V 750mAh
0.18 lb
Sale priceFrom $23.99 USD Regular price $29.99Unit priceIn stock (60 units) -
-
Up to 21% offNew arrival
BatteryWeb
GP 30AAM3BMX Cordless Phone Replacement Battery 3.6V 300mAh
0.1 lb
Sale priceFrom $21.99 USD Regular price $27.99Unit priceIn stock (159 units) -
-
Up to 21% offNew arrival
BatteryWeb
Alcatel Biloba 490 Replacement Battery 3.6V 300mAh
0.1 lb
Sale priceFrom $21.99 USD Regular price $27.99Unit priceIn stock (123 units) -
-
Up to 21% offNew arrival
BatteryWeb
AT&T 2422 Cordless Phone Replacement Battery 3.6V 300mAh
0.1 lb
Sale priceFrom $21.99 USD Regular price $27.99Unit priceIn stock (123 units) -
-
Up to 21% offNew arrival
BatteryWeb
Iloa 95 Cordless Phone Replacement Battery 3.6V 300mAh
0.1 lb
Sale priceFrom $21.99 USD Regular price $27.99Unit priceIn stock (123 units) -
