--- product_id: 102916645 title: "2Pack 12 Volt 3.5Ah B812-03 B812-01 B812-02 Replacement Battery Compatible with Dremel 12V Battery Lithium 8200 8220 8300 Cordless Tools" brand: "bonacell" price: "273.58 DT" currency: TND in_stock: true reviews_count: 8 url: https://www.desertcart.tn/products/102916645-2pack-12-volt-3-5ah-b812-03-b812-01-b812 store_origin: TN region: Tunisia --- # 2Pack 12 Volt 3.5Ah B812-03 B812-01 B812-02 Replacement Battery Compatible with Dremel 12V Battery Lithium 8200 8220 8300 Cordless Tools **Brand:** bonacell **Price:** 273.58 DT **Availability:** ✅ In Stock ## Quick Answers - **What is this?** 2Pack 12 Volt 3.5Ah B812-03 B812-01 B812-02 Replacement Battery Compatible with Dremel 12V Battery Lithium 8200 8220 8300 Cordless Tools by bonacell - **How much does it cost?** 273.58 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/102916645-2pack-12-volt-3-5ah-b812-03-b812-01-b812) ## Best For - bonacell enthusiasts ## Why This Product - Trusted bonacell brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description Product Details: Battery Voltage: 12Volts Battery Capacity: 3500mAh Battery Type: Lithium-ion Replacement Part#: For Dremel 8200 and 8220 rotary tools For Dremel 8300 oscillating tool Compatible with tools models: For Dremel 8200 For Dremel 8220 For Dremel 8300 For Dremel B812-02 ## Features - About this item - 【Battery Details】Capacity: 3500mAh | Voltage: 12V | Battery Type: Premium Li-ion | Rechargeable. Professional replacement for dremel 12v battery 【Fully Compatibility】Replacement for dremel 12v battery B812-03 B812-02 B812-01. 100% Compatible with 8200 and 8220 rotary tools, 8300 oscillating tools 【High Performance】Built-in premium Li-ion battery cells provide fast charging and low power consumption, no memory effect, can be charged or discharged as needed without loss of capacity, so that you can charge battery at anytime. 【Safety and Reliable】Intelligent Protection against potential damage caused by over-charging, over-discharging, over-voltage, over-current,short-circuit. with a high-quality, fire-resistant construction, ensure complete protection for you and your devices. Be multi-certified, tested and validated by manufacturer to match specifications of OEM products. 【Battery Maintenance】If you don't plan on using the Power Tool Battery for a month or more, store it in a clean, dry, cool place away from heat and metal objects. Ni-Cd, Ni-MH and Li-ion batteries will self-discharge during storage; remember to recharge the batteries before use. ## Images ![2Pack 12 Volt 3.5Ah B812-03 B812-01 B812-02 Replacement Battery Compatible with Dremel 12V Battery Lithium 8200 8220 8300 Cordless Tools - Image 1](https://m.media-amazon.com/images/I/61NEhsNnVUL.jpg) ![2Pack 12 Volt 3.5Ah B812-03 B812-01 B812-02 Replacement Battery Compatible with Dremel 12V Battery Lithium 8200 8220 8300 Cordless Tools - Image 2](https://m.media-amazon.com/images/I/61aZm0ML5uL.jpg) ![2Pack 12 Volt 3.5Ah B812-03 B812-01 B812-02 Replacement Battery Compatible with Dremel 12V Battery Lithium 8200 8220 8300 Cordless Tools - Image 3](https://m.media-amazon.com/images/I/61Z7sHh3NYL.jpg) ![2Pack 12 Volt 3.5Ah B812-03 B812-01 B812-02 Replacement Battery Compatible with Dremel 12V Battery Lithium 8200 8220 8300 Cordless Tools - Image 4](https://m.media-amazon.com/images/I/615tO9wkC+L.jpg) ![2Pack 12 Volt 3.5Ah B812-03 B812-01 B812-02 Replacement Battery Compatible with Dremel 12V Battery Lithium 8200 8220 8300 Cordless Tools - Image 5](https://m.media-amazon.com/images/I/61L9gAQ9PbL.jpg) ## Customer Reviews ### ⭐ Batteries do not work. Not as advertised. Read comments *by D***O on Reviewed in the United States on September 21, 2020* I just got the batteries today and they are not compatible with the dremel 8220. As you can see from my photos I have circled that there is a key. On the left that is the dremel battery and on the right the purchased battery replacement.. they are not compatible and now I need to return it.. the comments by the seller are not accurate or dremel made a change to the batteries. ### ⭐⭐⭐ Not compatable....but compatable *by D***L on Reviewed in the United States on December 21, 2021* As someone mentioned and shared pictures, these batteries will not fit the 8220 Dremel. It's a proprietary thing probably instituted by Dremel. However if you have already ordered this not knowing about the issues, there is a simple fix, and this should also not stop others from ordering these aftermarket batteries if you are looking for a compatible battery at a decent price. We have all ran into this in the ink to printer situation am I right? All you have to do is cut with a box knife the small square protrusion on the aftermarket battery and Bob's yer Uncle. I ran into this yesterday after these batteries were delivered. It took 5 seconds to realize what was going on. ### ⭐⭐⭐⭐ Bought 4 *by T***E on Reviewed in the United States on November 11, 2020* They only take a short time to charge but they run out of a charge within about 15 minutes, max. One already won't charge at all. I sent a message to them stating this and how do they want to handle the rating and they said they would send me two more but I never received them so, here we are. I keep rotating them until they are all out of charge then take a break. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/102916645-2pack-12-volt-3-5ah-b812-03-b812-01-b812](https://www.desertcart.tn/products/102916645-2pack-12-volt-3-5ah-b812-03-b812-01-b812) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-01*