is the charger for 3.0ah battery o.k to use with 4.oah battery

Yes you can! You can charge all kind of m18 batteries on the same charger. Same for M12, M14 and M28. As long as it fit in the charger ;)

Does the led power indicator work or is it fake?

From what I can tell the legitimate Milwaukee Batteries. I tend not to take a lot of notice of the indicator..your no when it’s running low when I use and when you need to charge it.

Will this battery fit m18bpo-o drill?

Yes it fits all milwaukee 18 volt drills

How long does this battery take to charge?

Have not timed the charging period. My experience is that all Milwaukee batteries charge quickly and turn-around is fast. Milwaukee is top bracket.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Milwaukee M18B4 4.0Ah Lithium-Ion Battery - Red

Product ID: 48924239

Details

Battery capacity
4
Battery cell composition
Lithium Ion
Brand
Milwaukee
Number of batteries
1 Lithium Ion
Recommended uses for product
Power Tool

⚡Individual cell monitoring

🔋4.0Ah high-capacity power

❄️Operates down to -18°C

SAR 351

Duties & taxes included

In stock

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Description

🔋 Power your hustle, no matter the weather!

SMART CELL MANAGEMENT - Individual cell monitoring optimizes performance and extends battery life.
DURABILITY MEETS SAFETY - Overload protection and temperature management system ensure long-term reliability and safe operation.
POWER THAT LASTS ALL DAY - 4.0Ah capacity delivers extended runtime for uninterrupted productivity.
BUILT FOR EXTREME CONDITIONS - Operates efficiently even in freezing temperatures down to -18°C, so your tools never quit.
STAY IN CONTROL WITH FUEL GAUGE - Integrated fuel gauge shows remaining charge at a glance—never get caught off guard.

The Milwaukee M18B4 4.0Ah Lithium-Ion Battery offers robust 18V power with smart cell monitoring and a fuel gauge for real-time charge status. Engineered to perform in temperatures as low as -18°C, it features overload protection and temperature management to maximize tool runtime and battery longevity, making it the go-to choice for professionals demanding reliability and endurance on the job.

Specifications

ASIN	B00CFNIM00
Amperage	4 Amps
Antenna Location	Power Tool
Battery Capacity	4
Battery Cell Type	Lithium Ion
Battery Weight	50 Grams
Best Sellers Rank	31,844 in DIY & Tools ( See Top 100 in DIY & Tools ) 126 in Cordless Tool Battery Packs
Brand Name	Milwaukee
Compatible Phone Models	all
Customer Reviews	4.7 4.7 out of 5 stars (363)
Included Components	1
Item Dimensions	17.3 x 8.3 x 15.5 centimetres
Item Type Name	4.0Ah Battery
Item Weight	381 Grams
Manufacturer	Milwaukee
Model Name	M18B4
Model Number	M18B4
Number of Batteries	1 Lithium Ion batteries required.
Product Warranty	No warrenty.
Reusability	Rechargeable
Unit Count	1.0 count
Voltage	18

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