Can I charge it with 220 V??

Don't think so. Charging calls for 110v in the charger (US) Would check voltage requirement.

Is this a good replacement for dremel B814-01?

I is a great replacement for my Dremel battery pack No. 855-02.

Is this compatible with Dremel model 8260?

I have the Dremel model 8260. This battery does NOT work in this model of Dremel. It fits the charger ok and seems to charge alright but the tool absolutely will not turn on with this battery installed and charged. The info on the original battery lists the battery # as B816-01. That is not the # listed on this Hanaix.

does this work with Dremel 8250 tool?

This battery works great for the Dremel 8220 that I have. You might want to check their website and ask if its compatible with the 8250. From what I've seen it won't work. Hope this helps

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🔋 Power your precision with Hanaix — never miss a beat on your projects!

POWER UP LIKE A PRO - 12V max voltage delivers consistent, reliable energy for your Dremel tools.
ENDURANCE THAT LASTS - 3.0Ah capacity ensures longer runtime, so you stay productive without constant recharging.
LIGHTWEIGHT COMPACT - Designed for easy portability, reducing fatigue during extended projects.
CHARGE FAST WORK FASTER - Compatible with original chargers for quick, hassle-free power boosts.
CERTIFIED QUALITY ASSURANCE - CE, FCC, PSE, RoHS certified for safety and performance you can trust.

The Hanaix 3.0Ah 12V Max Replacement Battery is a high-capacity, rechargeable lithium-ion battery designed specifically for Dremel 12V cordless rotary and oscillating tools. It offers quick charging compatibility, long-lasting performance with no memory effect, and is lightweight for easy handling. Certified to meet or exceed OEM standards, it ensures reliable power and durability for professional-grade tool use.

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Brand	Hanaix
Manufacturer	Hanaix
Model Name	Lithium Ion
Product Dimensions	8.41 x 4.7 x 4.78 cm; 170 g
Batteries	1 Lithium Ion batteries required. (included)
Item part number	B812
Compatible Devices	adapter
Voltage	12 Volts
Power Source	battery-powered
Batteries Included	Yes
Batteries Required	Yes
Battery Capacity	3000 Milliampere Hour (mAh)
Battery cell composition	Other Than Listed
Manufacturer	Hanaix
Item Weight	170 g

Hanaix 3.0Ah 12V Max Replacement Battery for Dremel B812-03 B812-02 8200 8220 8300 B812-01 Rotary Oscillating Cordless Tools for Dremel 12V Battery

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