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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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

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

Product ID: 744501366

Details

Number of Batteries
1 Lithium Ion
Brand
Hanaix
Battery Cell Composition
Other Than
Battery Capacity
3000 Hour
Recommended Uses For Product
Vacuum Cleaner
Net Quantity
1 count

⚡12V max power output

🔋3.0Ah high capacity

⏱️Quick charge compatible

Description

🔋 Power your precision with every charge!

CERTIFIED RELIABILITY - CE, FCC, PSE, RoHS certified for safety and durability that professionals trust.
LIGHTWEIGHT COMPACT - At just 170g, it’s easy to carry and reduces fatigue during long jobs.
POWER THROUGH PROJECTS - 3000mAh capacity delivers extended runtime for uninterrupted work sessions.
SEAMLESS COMPATIBILITY - 100% fits Dremel B812-01/02/03 and 8200/8220/8300 tools—no guesswork, just plug & play.
FAST RECHARGE LESS DOWNTIME - Supports quick charging with original adapters to keep you moving at full speed.

This 3.0Ah 12V rechargeable lithium-ion battery by Hanaix is a professional-grade replacement for Dremel rotary and oscillating tools, offering long-lasting power, quick recharge capability, and full compatibility with multiple Dremel models. Lightweight and certified for safety, it ensures reliable performance for demanding projects.

Specifications

ASIN	B0727VJWDY
Amperage	3 Amps
Antenna Location	Vacuum Cleaner
Battery Capacity	3000 Milliampere Hour (mAh)
Battery Cell Composition	Other Than Listed
Battery Cell Type	Other Than Listed
Battery Weight	168 Grams
Brand	Hanaix
Brand Name	Hanaix
Customer Reviews	4.3 out of 5 stars 404 Reviews
Item Dimensions	8.4 x 4.7 x 4.8 Centimeters
Item Weight Unit of Measure	0.17 Kilograms
Manufacturer	Hanaix
Model Name	Lithium Ion
Net Quantity	1 Count
Number of Batteries	1 Lithium Ion batteries required. (included)
Recommended Uses For Product	Vacuum Cleaner
Reusability	Rechargeable
UPC	652042606124
Unit Count	1 Count
Voltage	12 Volts

Reviews

A**R

Effectively powers a Dremel 8200

21.03.2025

R**B

Shockingly good

5.06.2025

J**L

More battery life at half the price

29.06.2020

T**8

Good battery

10.07.2025

R**E

Used 1x, worked just fine. Tried it again a few days ago, shows charge - but does not run the tool

11.05.2021

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