Water Tech Pool Blaster Pro 11.1V Replacement Battery LB003S2P-C
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Water Tech Pool Blaster Pro 11.1V Replacement Battery LB003S2P-C - 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.
Water Tech Pool Blaster Pro 11.1V Replacement Battery LB003S2P-C - is backordered and will ship as soon as it is back in stock.
Voltage
11.1V
Amp
5200mAh
Water Tech Pool Blaster Pro Series — 11.1V Li-ion Replacement Battery (LB003S2P-C)
This is an 11.1V, 5200mAh Li-ion replacement battery for the Water Tech Pool Blaster Pro, Precision Li, and Pro 900 cordless pool vacuums. It replaces part number LB003S2P-C and fits directly into the battery compartment on all three models. Use it when your original battery no longer holds charge or cuts out mid-clean.
- Pool Blaster Pro, Precision Li, Pro 900 compatibility: All three models run the same 11.1V three-cell Li-ion architecture and use the same BMS handshake with the charger. A single battery part covers the full range with no modifications needed.
- Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a Pool Blaster Pro unit. The BMS responded correctly to charge termination, and the motor drew consistently within the rated current envelope across suction modes.
- Pool vacuum charging protocol: Do not leave the Pool Blaster on the dock continuously between uses. These vacuums see irregular charge cycles — a session every few days with long dock time in between. Trickle current during extended dock sitting degrades cell capacity faster than regular discharge cycles do. Charge to full, then remove from the dock.
Suction dropping before the battery indicator hits low
This is a motor voltage sag issue, not a capacity issue. When the filter is partially blocked, the motor works harder, pulls more current, and causes the battery voltage to sag under load — even when the cell still has significant charge remaining. The BMS reads this sag as a low-voltage condition and scales back power delivery. Clean or replace the filter first; if suction restores immediately, the battery is fine.
Motor cutting out mid-clean then recovering after a pause
This is a BMS overcurrent trip, not a motor fault. Sustained restricted suction — from a clogged filter or blocked intake — causes the motor to draw current above the BMS trip threshold. The BMS cuts power to protect the cells, then resets after a short thermal recovery window. Clear the intake and rinse the filter before assuming the battery is at fault. If the cutout stops after cleaning, the battery is operating exactly as it should.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Water Tech
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Pool Blaster Pro runs for a much shorter time than it used to — could a partially blocked filter be the cause, not just the battery age?
Yes, and it's the first thing to check. A clogged filter forces the motor to draw above its rated current just to maintain suction, which accelerates battery depletion significantly. We measured noticeably higher current draw on the bench with a restricted intake versus a clean one. Rinse the filter thoroughly, reinstall it, and test before writing off the battery.
My new LB003S2P-C battery won't charge — the charger light stays green or doesn't respond at all.
The Pool Blaster charger uses a BMS handshake to confirm cell compatibility before delivering current. If the replacement cell's BMS doesn't complete that handshake, the charger sits idle or shows a false full-charge signal. First, leave the battery connected for 10 minutes — some BMS boards need a brief trickle before the handshake completes. If the charger still won't engage, measure the battery output terminals with a multimeter; a reading below 9V indicates deep discharge, and you'll need a charger that supports recovery charging to bring it back above the 9V threshold.
I left my Pool Blaster sitting on the dock for three weeks while the pool was closed — now the battery barely holds a charge. What happened?
Continuous dock charging applies a low-level trickle current even after the cells are full. Over weeks, that sustained trickle accelerates lithium-ion cell degradation and causes measurable capacity loss. The cells haven't failed — they've been partially damaged by the charge pattern. Going forward, charge the battery fully and remove it from the dock; store it at roughly 50–70% charge if the vacuum won't be used for an extended period.
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