PH26B Sprint PPC-6601 Replacement Battery 3.7V 4200mAh
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PH26B Sprint PPC-6601 Replacement Battery 3.7V 4200mAh - 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.
PH26B Sprint PPC-6601 Replacement Battery 3.7V 4200mAh - is backordered and will ship as soon as it is back in stock.
Voltage
3.7V
Amp
4200mAh
Sprint PPC-6601 — 3.7V Li-ion Replacement Battery (PH26B)
This is a 3.7V Li-ion battery rated at 4200mAh (15.54Wh) for the Sprint PPC-6601 Windows Mobile smartphone. It replaces OEM part numbers PH26B and AHTXDSSN. Fit is confirmed by matching connector pinout, physical dimensions (84.78 × 58.32 × 11.68mm), and BMS communication protocol.
- PPC-6601 platform fit: The PPC-6601 uses a single-cell Li-ion pack at 3.7V nominal. This replacement matches that voltage rail and the contact alignment the device's charge IC expects. No adapter or modification needed.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on a PPC-6601 unit. The BMS communicated correctly with the charge IC throughout, and charge termination triggered at the correct cutoff voltage without error flags.
- Fuel gauge recalibration on first use: After installing this cell, run one full discharge down to automatic shutdown, then charge uninterrupted to 100% before using the device normally. The PPC-6601's fuel gauge IC was calibrated to your old cell's discharge curve — one complete cycle resets that baseline against the new cell.
Why the PPC-6601 reports wrong battery percentage after a cell swap
The PPC-6601 uses a coulomb counter in its fuel gauge IC to track charge state. That counter builds a model of the cell's discharge curve over multiple cycles. When you swap in a new cell, the counter is still referencing the old cell's degraded curve — so the percentage readout is inaccurate until it recalibrates. One complete discharge-to-shutdown followed by a full uninterrupted charge gives the IC enough data to rebuild the curve against the new cell. After that cycle, percentage readings stabilise.
Sudden shutdown at 20–30% on a freshly installed cell
This happens when the fuel gauge IC hasn't recalibrated yet and the phone hits a voltage cliff under load — the modem or display draws current the IC didn't predict at that state of charge. The cell voltage drops below the BMS's cutoff threshold faster than the percentage reading reflects, and the phone shuts off to protect the cell. It is not a fault in the replacement battery. Run one full discharge cycle and the IC will map the actual voltage-to-capacity curve of the new cell, pushing that cliff below 5% where it belongs.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Sprint
- Manufacturer: CS
- Series: Extension
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My PPC-6601 won't turn on at all after sitting in a drawer for months with the new battery installed — is the battery dead?
It's almost certainly a BMS lockout. If the cell discharged below 2.5V during storage, the protection circuit trips and blocks current flow entirely to prevent cell damage. Connect the phone to a wall charger — not a PC USB port — and leave it for 30–45 minutes without pressing the power button. Most BMS circuits on Li-ion cells will begin a trickle pre-charge recovery at this point, and the phone should show a charging indicator before it can power on normally.
The PPC-6601 keeps jumping between, say, 47% and 63% every few minutes after I installed the replacement — what's causing that?
The fuel gauge IC is recalibrating against the new cell's discharge curve and doesn't have a stable model yet. It's pulling estimated state-of-charge from an old reference that no longer matches, so the counter corrects itself in visible jumps. Run one full discharge to automatic shutdown, then charge to 100% without interruption. After that single cycle the IC has enough data to smooth out the percentage tracking.
The phone gets noticeably warm near the battery compartment during charging — should I be concerned?
Mild warmth during the first few charge cycles on a new cell is normal. A fresh high-impedance cell forces the charge IC to work harder pushing current in, generating more heat than a broken-in cell would. If the warmth stays below uncomfortable-to-touch levels and the phone charges to 100% without stopping early, it's within spec. If the phone becomes hot to the touch or charging terminates before full, remove the battery and inspect the contacts for misalignment — a bent pin raises contact resistance and amplifies heat at the connection point.
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