Bosch BAT620 18V 4.0Ah Replacement Battery
- Compatible with Bosch 18V Professional power tools.
- Uses a 5S2P 18650-cell configuration with a true 4.0Ah rated capacity.
- Includes protection circuitry and verified BMS handshake on genuine Bosch chargers.
- Each batch ships with UN38.3, IEC 62133, MSDS, and CE documentation for EU, US, UK, AU, and JP customs clearance.
This is a replacement battery pack for general-purpose Bosch 18V Professional tools. The Bosch BAT620 18V 4.0Ah lithium-ion battery uses a 5S2P string of 18650 cells. This gives it a true 4.0Ah of rated capacity. It also has full protection circuitry and verified BMS handshake on genuine Bosch chargers. You can buy these batteries by themselves or as a set of two (BAT620-2PK). They are the same as the Bosch 18V power tool battery, so you can easily replace it.
The BAT620 is made by Dongguan Ruineng New Energy (Nuranu), a high-tech custom battery factory since 2012. It is made on a fully automated assembly line where every battery is tested at the end of the line. It is designed for original equipment manufacturers (OEM), hardware distributors, and private-label brands that need the same fit and performance as OEM products at factory-direct prices.
Compatible Host Tools
- Bosch 18V Professional drills, drivers & saws
- 18V grinders and rotary tools
- BAT609 / BAT618 / BAT620 compatible tools
Target Applications
- General-Purpose Tool Fleets: The 4.0Ah BAT620 balances runtime and weight for all-day use across the Bosch 18V Professional range.
- Distributors & Importers: A versatile mid-capacity pack that covers the broadest slice of the Bosch 18V installed base.
- Private-Label Brands: Sourced with your branding and carton-ready packaging.
Core Technical Advantages
1. Balanced 4.0Ah Capacity
Mid-capacity sweet spot — more runtime than compact packs, lighter than 6.0Ah high-capacity packs.
2. Full Protection 5S2P Architecture
Grade-A 18650 cells with comprehensive BMS protection for sustained discharge.
3. Verified Charger Handshake
BMS handshakes correctly with genuine Bosch chargers; behaves identically to the OEM pack.
Technical Specifications
| Feature | Specification |
|---|---|
| Replacement Model | BAT620 |
| Compatible Brand | Bosch |
| Nominal Voltage | 18V |
| Rated Capacity (real) | 4.0Ah |
| Cell Type | 18650 · 2000mAh |
| Configuration | 5S2P |
| Shell Color | Black + Red |
| Proprietary Mold | No (standard form factor) |
| Net Weight | Confirmed at order |
| Battery Dimensions | Confirmed at order |
| Inner Box | Confirmed at order |
| Master Carton | Confirmed at order |
| Qty per Carton | Confirmed at order |
| Carton Net / Gross | Confirmed at order |
Packaging & Wholesale Logistics
The BAT620 is shipped in a box ready for retail, designed for distributors to resell and for shipping internationally. Every batch of products is shipped with UN38.3 transport test reports, IEC 62133 safety certificates, MSDSs, and CE Declaration of Conformity. This helps ensure that customs can easily clear the products in the EU, US, UK, AU, and JP markets.
| Item | Details |
|---|---|
| MOQ | 100 units (catalog) · 500 units (private label) |
| Lead Time | 25–35 days standard · 18–22 days expedited |
| Payment | 30% T/T deposit + 70% against B/L |
| Warranty | 12 months |
Product Video
Frequently Asked by Distributors:
Do you supply the BAT620 as a 2-pack (BAT620-2PK)?
Yes. We supply the Bosch BAT620 18V 4.0Ah lithium-ion battery as single packs and as BAT620-2PK 2-pack configurations. Both options include your branding and are ready to be shipped in cartons.
What is the MOQ for the BAT620 replacement battery?
Is the BAT620 drop-in compatible with original Bosch chargers?
Yes. The BAT620 BMS is updated with special software so it works correctly with real Bosch chargers. The way it charges, confirms the charge, and prevents accidents is the same as the original equipment manufacturer’s. Handshake is validated on 100% of units at the end of the line.
Can the BAT620 replace the battery in my Bosch 18V cordless drill or power tool?
Yes, the BAT620 is a direct replacement for the Bosch 18V battery. It is used in professional cordless drills, drivers, grinders, and saws. If your tool uses the Bosch BAT-series 18V slide-on pack, the BAT620 is a true replacement battery for Bosch 18V power tools. It fits and works with the original equipment manufacturer (OEM) and is compatible with the charger.
Do you offer Bosch battery cell replacement, or complete BAT620 packs?
We supply complete, ready-to-use BAT620 replacement packs. We do not offer cell replacement or rebuild services. A new pack with fresh Grade-A cells and a new BMS is much more reliable than rebuilding an old Bosch pack. It also comes with full UN38.3 / IEC 62133 / CE documentation.
Which Bosch tools is the BAT620 compatible with?
The BAT620 is a direct replacement for the Bosch 18V Professional BAT-series platform. It has the same latch geometry as the BAT609, BAT618, and BAT622, and it fits the corresponding Bosch 18V Professional drills, drivers, grinders, and saws.
What cells and configuration does the BAT620 use?
The BAT620 uses high-quality 18650 cells (2000mAh each) arranged in a 5S2P configuration for a nominal 18V and a true rated capacity of 4.0Ah. Before assembly, cells are matched based on their capacity (±20 mAh) and internal resistance (±5 mΩ). You can specify your preferred cell brand (Samsung, LG, Panasonic, or BAK) when you place your order.
What protection circuitry does the BAT620 include?
The BAT620 includes a full-protection BMS: overcharge, over-discharge, short-circuit, and over-current protection, plus thermal monitoring. It matches the safety behavior of the real Bosch pack.
What is the warranty on the BAT620?
All BAT620 replacement packs come with a 12-month warranty against manufacturing defects. Every batch of products is shipped with the following documents:
– UN38.3 test report
– IEC 62133 certificate
– MSDS
– CE Declaration of Conformity
These documents are needed to clear customs worldwide.