Tennovis Integral D4 Cordless Phone Replacement Battery 3.7V 700mAh
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Tennovis Integral D4 Cordless Phone Replacement Battery 3.7V 700mAh - 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.
Tennovis Integral D4 Cordless Phone Replacement Battery 3.7V 700mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
700mAh
Tennovis Integral D4 — 3.7V Li-ion Replacement Battery (5010808000)
This 3.7V, 700mAh lithium-ion battery replaces the original pack in the Integral D4 cordless DECT handset. It matches OEM part numbers 5010808000 and 5010808030. Capacity figures are taken directly from product data — 2.59Wh total energy.
- Integral D4 fit: The D4 handset uses a compact Li-ion cell running at 3.7V nominal. Both OEM part numbers reference the same cell format — same footprint, same connector orientation, same BMS voltage acceptance window.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS held cutoff correctly at low-voltage threshold and accepted charge from a standard 3.7V Li-ion charge circuit without triggering protection mode.
- First charge after installation: Seat the handset in the base immediately after fitting this battery and leave it for a full charge cycle before first use. Li-ion cells shipped in storage-charge state need one complete charge to calibrate the handset's fuel gauge accurately.
Why the Integral D4 shows a charging error after a battery swap
Li-ion cells in storage drop below 3.0V over time. Some DECT base stations read incoming voltage before starting a charge cycle — if the cell arrives below that acceptance threshold, the base flags an error instead of charging. This is not a fault with the battery or the base. Place the handset in the base and wait up to 20 minutes — most Integral base units will begin a trickle pre-charge once the cell voltage recovers slightly above threshold, then switch to normal charge automatically.
Talk time noticeably shorter than the original battery after replacement
A new Li-ion cell does not always deliver full rated capacity on the first cycle. The handset's power management circuit estimates remaining charge based on voltage curves it learned from the old cell. After the first two or three full charge-and-use cycles, the circuit recalibrates. If talk time is still short after three full cycles, check that the handset is fully seated in the base during charging — a loose contact delivers incomplete charge and the cell never reaches 4.2V full charge voltage.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Tennovis
- Manufacturer: CS
- Series: Standard
- Color: Silver
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Integral D4 lost its pairing with the base after I put the new battery in — how do I get it back?
Removing a Li-ion cell from a DECT handset cuts power completely, and some DECT phones drop their pairing data when the supply is interrupted. The battery swap is the cause — not a faulty battery. Re-register the handset using the base station's paging or registration button while the handset is powered on and within 1 metre of the base. Check your Integral D4 manual for the exact key sequence, but the process typically takes under 60 seconds.
The Integral D4 handset is draining completely overnight even when it's sitting in the base — what's wrong?
This points to a seating issue, not a battery fault. If the handset's charge contacts are not making clean contact with the base cradle, the battery draws standby current all night with no top-up charge coming in. Lift the handset out, wipe the gold charge contacts on both the handset and the base with a dry cloth, then reseat firmly. Confirm the base charge indicator light comes on — if it does not illuminate within 30 seconds of seating, the contacts are not connecting.
The Integral D4 handset range seems shorter than it was with the original battery — is that a battery issue?
Yes, it can be. The D4's RF transmitter draws a current spike during transmission, and if the cell voltage sags under that load, the handset reduces transmit power to protect the circuit. This happens most often in the first few cycles when the new cell has not yet reached its full charge capacity. Run two or three complete charge-and-use cycles to let the cell reach its rated 700mAh. If range is still short, confirm the handset charges to full — check that the base charge light stays on for at least 2 hours before the handset is used.
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