Bosch BAT621 18V 6.0Ah High-Capacity Lithium-Ion Replacement Battery
Drop-in replacement battery pack for high-demand Bosch 18V Professional tools. The BAT621 delivers a high-capacity 6.0Ah from a 5S2P string of high-capacity 18650 cells, with full protection circuitry and verified BMS handshake on genuine Bosch chargers. It is the maximum-runtime Bosch 18V replacement battery for high-demand cordless power tools.
Overview
Drop-in replacement battery pack for high-demand Bosch 18V Professional tools. The BAT621 delivers a high-capacity 6.0Ah from a 5S2P string of high-capacity 18650 cells, with full protection circuitry and verified BMS handshake on genuine Bosch chargers. It is the maximum-runtime Bosch 18V replacement battery for high-demand cordless power tools.
Manufactured by Dongguan Ruineng New Energy (Nuranu) — a high-tech custom battery factory since 2012 — the BAT621 is produced under a fully automated assembly line with 100% aging and end-of-line testing. It is engineered for OEM clients, hardware distributors, and private-label brands that need OEM-equivalent fit and performance at factory-direct pricing.
Compatible Host Tools
- Bosch 18V Professional high-demand tools
- 18V rotary hammers, grinders & metal-cutting saws
- BAT609 / BAT618 / BAT621 compatible tools
Target Applications
- High-Demand Cordless Tools: The 6.0Ah BAT621 sustains long runtime for high-torque grinders, rotary hammers, and saws under continuous load.
- Production & Industrial Fleets: Maximizes uptime where Bosch 18V tools run all shift.
- Private-Label Brands: Sourced with your branding and carton-ready packaging.
Core Technical Advantages
1. High-Capacity 6.0Ah
Maximum runtime in the Bosch 18V Professional footprint — the highest-capacity pack in the line.
2. High-Capacity 5S2P Architecture
High-capacity 18650 cells sustain the continuous current high-demand tools draw without voltage sag.
3. Verified Charger Handshake
BMS handshakes correctly with genuine Bosch chargers; behaves identically to the OEM pack.
Product Video
Factory assembly line, BMS testing, and BAT621 demonstration footage. Contact sales for additional product videos.
Technical Specifications
| Feature | Specification |
|---|---|
| Replacement Model | BAT621 |
| Compatible Brand | Bosch |
| Nominal Voltage | 18V |
| Rated Capacity (real) | 6.0Ah |
| Cell Type | 18650 · 3000mAh |
| 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 BAT621 ships in carton-ready retail packaging engineered for distributor resale and international freight. Every batch ships with UN38.3 transport test report, IEC 62133 safety certificate, MSDS, and CE Declaration of Conformity for smooth customs clearance in EU, US, UK, AU, and JP markets.
- 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
Frequently Asked by Distributors
Need a Custom Quote or Technical Details?
Our engineering team is ready to discuss specifications, certification, MOQ, and OEM / private-label customization for the BAT621.
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