NovoPress ACO203 18V Li-ion Replacement Battery 3000mAh
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NovoPress ACO203 18V Li-ion Replacement Battery 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
⚠️ 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.
NovoPress ACO203 18V Li-ion Replacement Battery 3000mAh - is backordered and will ship as soon as it is back in stock.
Voltage
18V
Amp
3000mAh
NovoPress ACO203 Series — 18V Li-ion Replacement Battery
This 18V Li-ion battery replaces the original pack on the NovoPress ACO203, ACO203-XL, ACO202, and ACO401 cordless tools. Capacity is 3000mAh (54Wh). It uses the same connector and voltage rail as the OEM pack, so no adapters or modifications are needed.
- ACO203, ACO203-XL, ACO202, ACO401 compatibility: These four models share the same 18V battery platform, connector housing, and BMS communication protocol. Swapping between them requires no reconfiguration — the BMS handshake completes on first insertion.
- Bench tested on actual hardware: We ran this pack through repeated motor-start cycles on an 18V tool platform. The BMS handled inrush current spikes without tripping, held voltage above the low-cell cutoff threshold, and balanced cells across the discharge curve.
- Break-in for press tool applications: On first use, run the tool at partial load for two cycles before applying full pressing force. This lets the BMS profile the motor inrush draw and set overcurrent thresholds before it encounters maximum torque demands.
BMS cutoff on motor-start inrush surge
When you pull the trigger on a cordless press tool, the motor draws a spike of current before it reaches operating speed — often three to five times the steady running load. If the BMS flags that spike as an overcurrent fault, it cuts power instantly and the tool drops out mid-cycle. This pack's BMS is calibrated for the inrush profile of the ACO-series motors, so it distinguishes a normal start surge from a genuine fault. A cold pack makes this worse because Li-ion internal resistance rises below 5°C, amplifying the voltage sag at the moment of inrush.
Charger shows no activity or blinks fault after storage
Li-ion packs discharged below roughly 2.5V per cell will sit outside the acceptance window most chargers use to detect a valid pack — the charger sees the low cell voltage and refuses to begin a normal charge cycle. If this happens, some chargers have a recovery or trickle-charge mode that brings cells back up to 3.0V before switching to full charge. If your charger has no recovery mode, verify each cell reads at least 2.5V with a multimeter before assuming the pack is dead. Cells that recover to 3.0V and then charge to a full 18V (4.2V per cell on a 4S pack) are generally usable.
Compatible Models
Technical Specifications
Product Highlights
- Brand: NovoPress
- 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 NovoPress cuts out the instant I pull the trigger — why does it stop before the pressing cycle even starts?
That's a BMS overcurrent trip caused by motor-start inrush. At the moment of trigger pull, the motor draws a current spike well above its steady running load, and if the BMS threshold is set tight, it trips immediately. Cold temperatures make it worse — Li-ion internal resistance rises sharply below 5°C, which deepens the voltage sag during inrush and pushes the BMS closer to its cutoff point. Warm the pack to room temperature and test again before assuming a fault.
The tool runs but feels weak and bogs down under load — battery or motor?
Most likely voltage sag from high contact resistance at the battery rail. When current demand rises under load, even a few milliohms of resistance at the contacts drops the voltage at the motor noticeably. Remove the pack, inspect the terminal contacts on both the battery and the tool for oxidation or debris, and clean them with a dry cloth. Reinsert firmly and check that the pack voltage reads at least 17.5V under light load with a multimeter on the contacts.
The charger never stops blinking and the pack never reaches full charge after weeks of sitting unused — what's wrong?
Extended storage drains a Li-ion pack, and if any cell has dropped below the charger's acceptance threshold (typically around 2.5V per cell), the charger may cycle between trickle and fault states without completing a full charge. Check whether your charger has a recovery or wake-up mode — engage it and allow 15–20 minutes for the cells to recover to 3.0V per cell. Once cells recover, a normal charge cycle should run to completion and the pack should reach a resting voltage of 18V.
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