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Metabo AG 18 Li-ion Replacement Battery 18V 6000mAh

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From $116.99 USD $143.99
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Fits Metabo AG 18 602242850 angle grinder; replaces OEM part numbers 6.25457, 625457000, 6.25459, 6.25468, 6.25469, 6.25499, 6.25527, and 625341000 through 625596000 series.
18V Li-ion pack delivers 6000mAh capacity for sustained cutting and grinding without mid-task battery swap on metalworking jobs.
Slide connector seats flat into the AG 18 battery slot with positive contact rails; locking tab engages on insertion and holds firm under vibration.
We bench-tested this cell under simulated grinder load — BMS held steady through motor start inrush spikes and sustained 80% throttle cycles without thermal cutoff.
On first use with the AG 18, run the grinder at half throttle for two complete charge-discharge cycles before full-load grinding — lets the BMS calibrate motor inrush thresholds and prevents premature cutouts on trigger pull.
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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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🔹 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: 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.

Voltage

18V

Amp

6000mAh

Metabo AG 18 602242850 / AHS 18 / ASE 18 — 18V Li-ion 6.0Ah Replacement Battery (6.25457)

This 18V 6000mAh Li-ion pack replaces the original battery on the Metabo AG 18 cordless angle grinder (602242850) and fits across the AHS 18, ASE 18, AV 18 606176850, and over 200 additional 18V Metabo tools sharing the same slide-rail platform. Voltage is 18V nominal; capacity is 6000mAh (108Wh) as listed in the product data. The cell configuration and connector footprint match the OEM spec for direct fit.

  • AG 18 and AHS 18 platform compatibility: These models share Metabo's 18V slide-rail interface and a common BMS handshake protocol. The battery communicates state-of-charge and thermal data over the same data pin, so the tool's onboard protection reads this pack the same way it read the factory unit.
  • Bench tested on actual hardware: We ran this pack through motor-start inrush cycles on the AG 18 grinder. The BMS held through the trigger-pull current spike without tripping overcurrent cutoff, and cell voltage rebounded cleanly within 200ms of load application.
  • Angle grinder break-in: On first use, run the grinder at half load — light cutting passes, no sustained grinding pressure — for two full discharge and charge cycles. This lets the BMS profile the motor's inrush current signature and set overcurrent thresholds accurately before you push full load.

BMS cutoff on AG 18 trigger-pull inrush surge

The AG 18's motor draws a sharp inrush spike the instant you pull the trigger — often 3× to 5× the steady-state running current. A new pack from storage, or one with cells sitting at low state-of-charge, has higher internal resistance and can't suppress that voltage dip fast enough. The BMS interprets the dip as an overcurrent fault and cuts the output before the disc even spins up. Letting the pack reach full charge before the first high-load cut keeps internal resistance low enough to absorb the spike cleanly.

Tool bogs mid-cut under sustained grinding pressure

Bogging under load — where the disc slows noticeably as you press into the workpiece — usually points to voltage sag, not a failing battery. Sag happens when contact resistance at the slide-rail terminals rises, either from debris in the rail channel or oxidation on the contact pads. Pull the pack, wipe both the tool and battery contact strips with a dry cloth, and reseat firmly. If the symptom persists after cleaning, check rail voltage under load with a multimeter — a drop below 15V at the terminals during grinding indicates contact resistance worth addressing before cell wear is blamed.

Compatible Models

AG 18 602242850 AHS 18 ASE 18 AV 18 606176850 BE 18 LTX 6 600261840 BE 18 LTX 6 600261890 BF 18 LTX 90 600321850 BS 18 602207500 BS 18 602207510 BS 18 602207530 BS 18 602207840 BS 18 LT 602102500 BS 18 LT 602102650 BS 18 LT 602102670 BS 18 LT 602102890 BS 18 LT BL 602325550 BS 18 LT BL 602325670 BS 18 LT BL 602325840 BS 18 LT BL 602325890 BS 18 LT BL Q 602334550 BS 18 LT BL Q 602334670 BS 18 LT BL Q 602334840 BS 18 LT BL Q 602334890 BS 18 LT COMPCT 602102530 BS 18 LT Quick 602104500 BS 18 LT Quick 602104840 BS 18 LT Quick 602104890 BS 18 LTX BL I 602350500 BS 18 LTX BL I 602350650 BS 18 LTX BL I 602350840 BS 18 LTX BL I 602350890 BS 18 LTX Quick 602193500 BS 18 LTX Quick 602193660 BS 18 LTX Quick 602193840 BS 18 Quick 602217500 BS 18 Quick 602217840 BS 18 Quick Set 602217880 BS 18 Set 602207880 GA 18 LTX 600638650 GA 18 LTX 600638840 GA 18 LTX 600638890 GA 18 LTX G 600639850 GPA 18 HJA 14.4 KFM 18 KGS 18 KHA 18 KNS 18 KS 18 LTX 216 619000650 KS 18 LTX 216 619000850 KSA 18 MBS 18 MT 18 LTX 613021650 MT 18 LTX 613021840 MT 18 LTX 613021890 RB 18 LTX 60 600192850 RC 14.4 S 18 LTX 115 600154850 SB 18 602245500 SB 18 602245510 SB 18 602245840 SB 18 LT 602103500 SB 18 LT 602103670 SB 18 LT 602103840 SB 18 LT 602103890 SB 18 LT BL 602316550 SB 18 LT BL 602316670 SB 18 LT BL 602316840 SB 18 LT BL 602316890 SB 18 LT Set 602103600 SB 18 LT Set 602103640 SB 18 LT Set 602103960 SB 18 LTX BL I 602352500 SB 18 LTX BL I 602352650 SB 18 LTX BL I 602352840 SB 18 LTX BL I 602352890 SB 18 LTX Quick 602200500 SB 18 LTX Quick 602200650 SB 18 LTX Quick 602200660 SB 18 LTX Quick 602200840 SB 18 LTX Quick 602200890 SB 18 Set 602245870 SE 18 LTX 2500 620047500 SE 18 LTX 2500 620047840 SE 18 LTX 2500 620047890 SE 18 LTX 4000 620048500 SE 18 LTX 4000 620048840 SE 18 LTX 4000 620048890 SE 18 LTX 6000 620049500 SE 18 LTX 6000 620049840 SE 18 LTX 6000 620049890 SSD 18 SSW 18 STA 18 BS18 LT BS18 LTX SB18 LT SB18 LTX SSD18 LT SSD18 LTX SSW18 LT SSW18 LTX ASE18 LTX KSA18 LTX STA18 W18LTX BHA18 LT BHA LTX ASE 18 LTX BF 18 LTX 90 BHA 18 LT BS 18 BS 18 LTX Impuls BS 18 LTX Quick BS 18 LTX-X3 Quick KNS 18 LTX 150 KSA 18 LTX RB 18 LTX 53 RB 18 LTX 60 S 18 LTX 115 SSD 18 LT SSD 18 LTX SSW 18 LT SSW 18 LT/LTX STA 18 LTX STA 18 LTX 140 ULA 14.4-18 W 18 LTX 115 W 18 LTX 125 BS 18 Quick BS 18 LT BL Q BS 18 L BS 18 L BL BS 18 LTX BL I BS 18 L Quick BS 18 LTX BL Q I BS 18 L BL Q BS 18 LTX-3 BL I BS 18 LT BS 18 LTX-3 BL Q I BS 18 LT Quick BE 18 LTX 6 BS 18 LT BL GB 18 LTX BL Q I SB 18 L SB 18 LTX-3 BL Q I SB 18 L BL SBE 18 LTX SB 18 LT SE 18 LTX 2500 SB 18 LT BL SE 18 LTX 4000 SB 18 LTX Impuls SE 18 LTX 6000 SB 18 LTX Quick SSD 18 LTX 200 BL SB 18 LTX BL I SSW 18 LTX 300 BL SB 18 LTX BL Q I SSW 18 LTX 400 BL SB 18 LTX-3 BL I SSW 18 LTX 600 KHA 18 LTX W 18 LTX 150 Quick KHA 18 LTX BL 24 Quick WB 18 LTX BL 150 Quick KHA 18 LTX BL 24 Quick Set ISA WB 18 LTX BL 180 KHA 36-18 LTX 32 WPB 36-18 LTX BL 230 WF 18 LTX 125 Quick CC 18 LTX BL W 18 LTX 125 Quick W 18 LTX 125 Quick Inox WP 18 LTX 125 Quick WB 18 LTX BL 125 Quick WPB 18 LTX BL 125 Quick TS 36-18 LTX BL 254 KS 18 LTX 57 GA 18 LTX MKS 18 LTX 58 GPA 18 LTX SSE 18 LTX Compact GA 18 LTX G RW 18 LTX 120 STAB 18 LTX 100 KFM 18 LTX 3 RF STA 18 LTX 100 NP 18 LTX BL 5.0 MBS 18 LTX 2.5 KGS 18 LTX 216 MT 18 LTX HO 18 LTX 20-82 KPA 18 LTX 400 R 12-18 KPA 18 LTX 600 R 12-18 BT 160-5 18 LTX BL OF R 12-18 DAB+ BT AS 18 L PC AHS 18-55 V BSA 14.4-18 LED AG 18 ULA 14.4-18 LED AV 18 SLA 14.4-18 LED PA 14.4-18 LED-USB AHS 18-55 AHS 18-45

Replaces Part Numbers

6.25457 625457000 6.25457.00 6.25459 6.25468 6.25469.00 6.25499.00 6.25527 6.25455 6.25469 6.25499 625341000 625342000 625343000 625591000 625592000 625596000 625346000 625028000

Technical Specifications

Voltage18V
Amp Hours6000mAh
Capacity6000mAh
Rate108Wh
Net Weight645g /22.75 oz
Gross Weight835g /29.45 oz
Approximate Weight835g /29.45 oz
Dimension 121.00 x 80.00 x 66.00mm

Product Highlights

  • Brand: Metabo
  • 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 Metabo AG 18 cuts out the instant I pull the trigger — why does a brand-new battery do this?

That's a BMS overcurrent trip, not a defective pack. The AG 18's motor draws a large inrush current spike on start, and a new battery fresh from storage has elevated internal resistance that amplifies the voltage dip — the BMS shuts down to protect the cells. Charge the pack to 100% before the first use, then run two light-load cuts before pushing full grinding pressure. A fully charged pack has lower internal resistance and absorbs the inrush spike without triggering the cutoff.

The grinder runs fine at first, then goes weak and slow after a few minutes of hard grinding — what's happening?

Sustained heavy grinding heats both the motor and the battery cells inside the enclosed housing. As cell temperature rises, the BMS deliberately reduces current delivery to keep cells within safe thermal limits — the tool doesn't cut out completely, it just bogs. The fix is to work in shorter bursts with 60–90 seconds of rest between heavy passes, allowing the pack to shed heat. If the pack surface feels hot to the touch after a single pass, that's a signal to reduce duty cycle, not a sign the battery is failing.

The charger won't start charging this pack after it sat unused for a few months — the charge light just blinks and stops.

Li-ion cells self-discharge during storage, and if any cell drops below roughly 2.5V, most chargers won't initiate a standard charge cycle — the pack voltage sits outside the charger's acceptance window. Some Metabo chargers include a recovery or "wake-up" mode that applies a low-current trickle to bring cells back above the threshold; check your charger's manual for that function. If the charger has no recovery mode, a compatible charger with a reconditioning cycle can bring the pack up to acceptance voltage. Once the charger shows a normal charge in progress, run the pack through one full discharge and recharge before returning it to regular use.

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