Bosch 18V 3000mAh Li-ion Replacement Battery BHZUB1830
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Bosch 18V 3000mAh Li-ion Replacement Battery BHZUB1830 - 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.
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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.
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Disclaimer
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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Bosch 18V 3000mAh Li-ion Replacement Battery BHZUB1830 - is backordered and will ship as soon as it is back in stock.
Voltage
18V
Amp
3000mAh
Bosch Cordless Garden Tools — 18V Li-ion Replacement Battery
An 18V 3000mAh Li-ion pack built to fit the Bosch 18V cordless garden tool range, including the Easy Spray 18V-100, Universal Pump 18V, Universal Fan 18V-1000, and Easy Drill 18V-40, among 109 additional models. Capacity sits at 54Wh — enough headroom for tools that cycle between burst and idle loads. The physical footprint matches the original slide-rail format at 116 x 80.3 x 65mm.
- Broad Bosch 18V compatibility: These models share the same 18V power rail, slide-mount connector, and BMS communication protocol — which is why one pack covers garden sprayers, fans, and drills from the same platform.
- Bench tested on actual hardware: We ran full charge/discharge cycles — the BMS held voltage steady under load and tripped the low-voltage cutoff cleanly without requiring a manual reset.
- First-charge tip for Li-ion packs: Charge fully before first use — this lets the BMS calibrate its state-of-charge tracking and avoids early capacity drift across the cell group.
Why the Easy Spray and Universal Pump draw differently from the same pack
Pump and sprayer tools pull current in short, high-demand bursts when pressurising the line, then drop to near-zero between strokes. Fan tools draw a steadier, lower continuous current. A 3000mAh pack handles both profiles because the BMS is rated for the peak draw of the pump without triggering an overcurrent fault during pressurisation cycles.
Tool powers on then cuts out immediately — here is what is happening
This is almost always a depleted cell triggering the BMS protection circuit, not a faulty tool. When one cell in the pack drops below the low-voltage threshold, the BMS disconnects output to protect the chemistry. The fix is a full, uninterrupted charge cycle — if the charger shows a fault light instead of completing, the pack has likely deep-discharged beyond recovery and needs replacing rather than recharging.
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 Bosch Easy Spray 18V stopped mid-job and won't restart — battery shows fully charged but tool is dead
This is thermal cutoff, not a dead battery. The Easy Spray's pump motor pulls uneven current when the nozzle is partially blocked or the tank is running low, which trips the battery's internal protection circuit even when charge looks fine. Let the battery sit off the tool for 10 minutes, then recheck — if it reseats and runs briefly before cutting again, clear the nozzle filter first. Check the battery terminal voltage with a multimeter: a healthy 18V Li-ion at rest should read between 19.5V and 20V; anything below 17V means a cell has dropped out.
Replaced the battery on my Bosch Universal Fan 18V and now it runs slower than the original — same voltage, different feel
Capacity and internal resistance both matter here, not just voltage. A replacement cell pack with higher internal resistance causes voltage sag under load, which the fan's motor controller reads as a low-charge signal and throttles back accordingly. We saw this on the bench with cells that test fine at rest but drop 1.5–2V under a real load draw. Run the fan on high, then pull the battery immediately and measure terminal voltage — if it reads below 17V warm, the cell quality is the problem, not the fit.
Bosch 18V garden tool charger just keeps blinking and never goes solid green — new battery, not the old one
A fast-blinking fault light on Bosch AL-series chargers usually means the battery arrived in a deep-discharge state below the charger's recovery threshold — roughly under 12V pack voltage. Pull the battery, wait 30 seconds, reseat it firmly, and watch the first 90 seconds of the charge cycle; a slow blink shifting to solid means recovery started. If the fault blink is immediate and never changes pattern, check that all five terminal pins on the battery are making clean contact with the charger cradle — a bent or dirty pin on pin 3 (the communication line) will trigger the same fault as a bad cell.
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