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Philips EasyClean HX6780 Replacement Battery 3.7V 800mAh

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From $33.99 USD $41.99
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Fits Philips EasyClean models HX6780 and HX6380, replacing OEM part 4235 010 13068.
3.7V, 800mAh lithium-ion cell delivers full motor torque on the oscillating brush head.
Cylindrical cell seats vertically in the handle cavity with brass contact pins at base.
Bench testing showed clean voltage ramp on first charge with no BMS shutdown events.
Remove the toothbrush from the charging base immediately after full charge — continuous dock trickle charging degrades this cell's capacity noticeably faster than partial-cycle use.
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Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.

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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

🔹 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: 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.

Voltage

3.7V

Amp

800mAh

Philips EasyClean HX6780 / HX6380 — 3.7V Li-ion Replacement Battery (4235 010 13068)

This 3.7V, 800mAh Li-ion cell replaces the internal battery in the Philips EasyClean electric toothbrush range, covering HX6780, HX6380, and Series 300 models. It fits the same sealed compartment as the original and matches the BMS handshake the toothbrush firmware expects. Install this when the original cell no longer accepts a charge or the brush loses power mid-use.

  • HX6780, HX6380, and Series 300 compatibility: These models share the same 3.7V single-cell architecture, connector pinout, and BMS communication protocol — which is why one cell covers the full range without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and discharge on the EasyClean platform. The BMS accepted the cell immediately, voltage settled at 4.19V at full charge, and the motor control circuit drew steady current through the full discharge curve without triggering an early cutoff.
  • Dock charging habit for this toothbrush: Remove the toothbrush from the inductive charging base once it reaches full charge and only return it when the cell drops below 30%. The base delivers a continuous trickle charge, and leaving the brush seated permanently accelerates capacity fade in the Li-ion cell far faster than partial-charge cycling does.

Why the EasyClean loses brushing power before the indicator shows low

The EasyClean's power indicator reads state of charge from a voltage threshold, not from actual cell capacity. As the Li-ion cell ages, internal resistance rises. Under the brush motor's load, voltage sags below what the motor needs for full oscillation speed — even while the cell still shows sufficient resting voltage to keep the indicator lit. The result is a brush that feels weaker long before the LED signals a low battery. Replacing the cell resets the internal resistance and restores the full voltage delivery the motor expects under load.

Toothbrush not charging on the inductive base after a battery swap

The EasyClean uses inductive charging, which is sensitive to coil alignment between the base and the handle. If the brush head is not fully seated and clicked down onto the base post, the primary and secondary coils fall out of alignment and charging current drops to near zero. After a battery replacement, the handle reassembly can shift slightly — push the handle firmly onto the base and confirm the charge indicator activates. If it still does not charge, check the new cell's resting voltage with a multimeter; it should read at least 3.0V before the charger will initiate a charge cycle.

Compatible Models

EasyClean HX6780 HX6380 Series 300 models Sonicare DiamondClean HX9333 HX9370 HX9100 series Sonicare DiamondClean HX9340 HX992W HealthyWhite HX6700 HX6300 HX993L HX9300 HX9383 HX9140 HX6150 Sonicare DiamondClean HX9343 HX993B HX6300 series FlexCare Platinum Sonicare DiamondClean HX9350 Sonicare DiamondClean HX9352 HX6710 HX6711 HX993S HX6600 models HX6310 HX6311 HX6950 HX6900 series HX9310 HX6320 HX6160 HX9390 Sonicare DiamondClean HX9310 FlexCare+ HX9150 FlexCare HX6600 HX8900 HX939B Sonicare DiamondClean HX939L HX6500 series HX6960 HX6840 HX6720 HX684J HX939W HX6330 HX684G Sonicare HX6310 HX684B HX939P HX684E HX9160 HX939L HX6700 series HX684A Sonicare DiamondClean HX9330 HX8910 HX6970 HX9600 HX6730 HX684P HX6610 HX6731 HX685K HX6340 HX960K HX9333 HX6980 HX6100 HX9330 HX685J HX685E HX685B Sonicare DiamondClean HX9383 HX685T HX6900 HX8920 HX6500 HX9343 HX9100 HX9340 HX9900 series DiamondClean Sonicare DiamondClean HX9390 ProtectiveClean HX9900 HX6910 HX6750 HX6630 HX9300 series HX6510 HX6511 HX8930 HX962P HX6760 HX9350 HX6800 series HX9352 HX9110 HX8920B HX9190 Sonicare DiamondClean HX9360 ExpertClean HX6920 HX6800 HX680B HX9360 HX680C HX680D HX8900 models (5 series) HX680E HX9120 HX9600 series HX991B Sonicare DiamondClean HX9370 HX991W HX6930 HX991R Sonicare Diamond Clean HX9140 HX6100 series HX680Q HX6530 HX680J HX991P

Replaces Part Numbers

4235 010 13068 4235 010 1215

Technical Specifications

Voltage3.7V
Amp Hours800mAh
Capacity800mAh
Rate2.96Wh
Net Weight21g /0.74 oz
Gross Weight46g /1.62 oz
Approximate Weight46g /1.62 oz
Dimension 51.50 x 15.10 x 14.20mm

Product Highlights

  • Brand: Philips
  • Manufacturer: CS
  • Series: Standard
  • Color: Blue
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My EasyClean brush feels noticeably weaker halfway through brushing — does that mean the new battery is already failing?

Not necessarily. On the first two to three cycles, the BMS is still conditioning to the new cell's discharge curve, and motor speed can feel inconsistent until the electronics calibrate. Run two to three full charge and discharge cycles without leaving it on the dock continuously. If the weakness persists after cycle three, check the resting voltage — a healthy cell at 50% charge should read between 3.7V and 3.85V.

The toothbrush sits on the charging base all day but the battery still drains quickly — what's happening?

Continuous trickle charging from an inductive base keeps the cell held at full voltage for extended periods, which stresses the Li-ion chemistry and compresses usable capacity over time. The charger never truly switches off — it keeps topping up small losses from self-discharge. Break the habit by removing the brush from the base once the indicator shows full, and only dock it again when charge drops below roughly 30%. That single change slows capacity fade significantly.

The brush head vibrates weakly on the very first use after replacing the battery — is the motor damaged?

The motor is almost certainly fine. When a fresh Li-ion cell is installed, the BMS starts with conservative current limits until it maps the cell's internal resistance across the first discharge. That restricts the current the motor receives and produces lower oscillation amplitude. Run the brush until the cell is nearly flat, then charge it fully without interrupting the cycle. By the end of the second full cycle, current delivery normalises and brushing speed returns to full strength.

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