Bosch PSR 18 LI-2 Replacement Battery 18V 3000mAh
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Bosch PSR 18 LI-2 Replacement Battery 18V 3000mAh - 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
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Bosch PSR 18 LI-2 Replacement Battery 18V 3000mAh - is backordered and will ship as soon as it is back in stock.
Voltage
18V
Amp
3000mAh
Bosch PSR 18 LI-2 / PSB 18 LI-2 Series — 18V Li-ion Replacement Battery (2 607 335 040)
This is an 18V 3000mAh Li-ion battery for the Bosch PSR 18 LI-2 and PSB 18 LI-2 series cordless drill/drivers. It replaces OEM part numbers 2 607 335 040, 2 607 336 039, 1 600 Z00 000, and related cross-references. The battery slots into the same slide-rail pack interface and communicates with the tool's BMS over the same signal line as the original.
- PSR 18 LI-2 and PSB 18 LI-2 compatibility: These models share an identical 18V slide-rail connector format and the same BMS handshake protocol. One battery works across the full drilling, screw-driving, and sanding variants without adapter or modification.
- Bench tested on actual hardware: We cycled this pack through repeated motor-start inrush events on a PSR 18 LI-2. The BMS held the overcurrent threshold correctly and did not trip during normal trigger pulls at full torque.
- Break-in on the PSR 18 LI-2: On first use, run the drill at half load — light drilling, no high-torque fastening — for two full discharge and charge cycles. This lets the BMS log the motor's inrush current profile before it locks in overcurrent trip thresholds.
BMS cutoff on motor-start inrush surge in the PSR 18 LI-2
When you pull the trigger on a cordless drill, the motor draws a brief current spike — often three to five times the running current — before the armature reaches speed. A new or storage-depleted pack can have slightly elevated internal resistance, which amplifies the voltage drop at that spike. If the BMS reads the drop as an overcurrent fault, it cuts the output rail and the tool stops dead. Running two break-in cycles at half load lowers internal resistance and lets the BMS calibrate before it sees full motor-start demand.
Charger shows blinking red and won't accept the pack after storage
Li-ion cells stored without periodic top-up can drop below the charger's acceptance threshold — typically around 2.5V per cell. The Bosch AL 1830 CV charger signals this state with a blinking red LED and refuses to begin the charge cycle. Connect the pack to a charger that supports a low-voltage recovery or "wake-up" pre-charge mode, or briefly connect a known-good pack in parallel for 60 seconds to raise the cell voltage above 2.8V per cell. Once above threshold, the standard charger will accept it and resume the normal charge sequence.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Bosch
- 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 PSR 18 LI-2 cuts out the instant I pull the trigger on a tough screw — what's happening?
That's a BMS overcurrent trip, not a faulty battery. The motor-start inrush current spikes hard the moment the trigger opens, and if the pack's internal resistance is elevated from storage or a new cell formation state, the voltage rail dips sharply and the BMS interprets it as a fault. Run two light-load cycles first — drilling into softwood, no drive applications — before putting the drill under full torque. After two cycles the BMS recalibrates its trip threshold and the cutout stops.
The drill feels weak and bogs down halfway through a hole — battery shows charged but the tool has no power. What's wrong?
That's voltage sag under load, not a capacity problem. High contact resistance at the slide-rail terminals — from dirt, oxidation, or a loose pack latch — causes the voltage to drop under motor load even when the pack reads full at rest. Wipe the battery terminals and the tool's contact rails with a dry cloth, reseat the pack firmly until it clicks, and retest under load. If sag persists, measure the terminal voltage under load with a multimeter — anything below 15V at the rail under moderate drill load points to a cell or connection issue worth investigating further.
The drill worked fine in summer but now it bogs and the BMS trips constantly in a cold garage — is the battery dead?
No — Li-ion internal resistance rises sharply below 5°C, which pushes the BMS closer to its overcurrent trip threshold on every motor start. The cells aren't damaged; they're just less conductive when cold. Store the battery indoors at room temperature and only fit it to the tool immediately before use. If the garage is consistently below 5°C, expect reduced torque output — keep the pack above 10°C and performance returns to rated levels.
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