Philips FC8700 Replacement Battery 12.8V 1400mAh
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Philips FC8700 Replacement Battery 12.8V 1400mAh - 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.
Philips FC8700 Replacement Battery 12.8V 1400mAh - is backordered and will ship as soon as it is back in stock.
Voltage
12.8V
Amp
1400mAh
Philips FC8700 / FC8710 Series — 12.8V LiFePO4 Replacement Battery (4IFR19/66)
This is a 12.8V 1400mAh LiFePO4 replacement battery for the Philips FC8700, FC8603, FC8705, and FC8710 cordless stick vacuums. It replaces OEM part numbers 4IFR19/66 and CP0111/01. Fits the original battery housing directly — same cell format, same BMS interface.
- FC8700 / FC8710 platform compatibility: These models share the same 12.8V LiFePO4 cell pack, connector pinout, and BMS communication protocol. The charger handshakes with the BMS before delivering current, so the replacement cell must match the original chemistry — LiFePO4 to LiFePO4, not Li-ion.
- Bench tested on actual hardware: We cycled this pack through charge and discharge on the FC8700 platform. The BMS accepted the charger handshake on the first connection, drew current normally, and cut off cleanly at full charge. No fault codes triggered during motor-load testing.
- Dock charging on the FC8700: Do not leave this vacuum sitting on the dock continuously. LiFePO4 handles trickle charge better than Li-ion, but the FC8700 dock does not cut power when full. Charge until complete, then remove — this alone preserves cell capacity over months of use.
Suction dropping before the battery indicator reaches low on the FC8700
This happens when the motor draws more current than the BMS allows under sustained restriction — usually a partially blocked filter or full dustbin. The BMS interprets the elevated draw as an overcurrent event and steps down power to protect the cell, which the user feels as suction loss. The battery indicator reads mid-charge because cell voltage is still within normal range — the issue is current demand, not stored energy. Clear the filter and empty the bin before suspecting the battery.
Motor cutting out mid-clean and recovering after a few seconds
This is a BMS overcurrent trip, not a dead battery. When the vacuum hits a dense carpet pile or a blockage, motor current spikes above the BMS threshold and the pack shuts output to protect the cells. The BMS resets automatically after a few seconds once current demand drops. If trips are frequent, the filter is likely restricting airflow and forcing the motor to work harder than rated. Clean or replace the FC8700 filter and confirm the dustbin is below the max fill line — that alone resolves most repeat cut-out complaints.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Philips
- Manufacturer: CS
- Series: Standard
- Color: Blue
- Product Type: LiFePO4
- Battery Type: LiFePO4
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Philips FC8700 battery was replaced but the charger won't start charging — just a flashing light. What's wrong?
The FC8700 charger checks for a valid BMS handshake before delivering current — if it reads an unexpected response, it flashes an error and stops. This usually means the replacement cell chemistry doesn't match what the charger expects, or the BMS is in a low-voltage lockout state from deep discharge before installation. Connect the battery and hold it on the charging contacts for 90 seconds without interruption — some BMS units need a sustained low-current signal to exit lockout and accept a full charge cycle. If the charger then shows a solid charge indicator, the pack is recovering normally.
The FC8700 suction feels weaker than it did with the old battery even though this one shows fully charged. What causes that?
A clogged or saturated filter forces the motor to work harder to pull air, which increases current draw and causes the BMS to cap output below full motor speed. The battery isn't the cause — the motor is being throttled by the BMS responding to elevated current demand, not low cell voltage. Remove and tap out the foam and mesh filters, or replace them if they haven't been changed in over six months. After cleaning the filters, run the vacuum again — suction should return to full strength within the first pass.
After a few months the FC8700 doesn't last as long per charge as it did when we first installed this battery. Is that normal fade or something we caused?
Capacity fade this fast is almost always caused by continuous dock charging — leaving the vacuum docked between every use keeps the BMS applying a trickle signal that stresses LiFePO4 cells over time. The FC8700 dock does not cut power automatically when the pack reaches full charge. Charge the battery fully, remove it from the dock, and only return it when it needs charging again. Following this pattern from now on will slow further fade — check resting voltage after a full charge, which should read 14.4V to 14.6V across the terminals on a healthy pack.
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