Draper Storm Force® 20V Li-ion Battery, 4.0Ah

Extend your runtime and keep your Draper Storm Force® 20V cordless tools working longer between charges with the Draper Storm Force® B20LISF 20V 4.0Ah Li-Ion Battery — a high-capacity spare or replacement battery designed specifically for the Draper Storm Force® 20V Power Interchange series. Whether you're looking to add a second battery to your toolkit for uninterrupted back-to-back working, replace an ageing battery on an existing tool, or simply ensure you always have a fully charged battery ready to go, the B20LISF is the ideal solution for Storm Force 20V tool users.

Part of the Draper Storm Force® 20V Power Interchange system, the B20LISF is fully compatible with every tool in the Storm Force 20V range — meaning a single battery works seamlessly across your entire 20V cordless toolkit from one charge to the next. Whether you're switching between a drill driver, circular saw, jigsaw, sander, or any other tool in the Storm Force 20V family, the same battery fits and powers them all without adaptation or compromise. This interchangeability is the core practical advantage of building your cordless toolkit around a single battery platform — one battery system, one charger, and the freedom to move between tools instantly on site or in the workshop.

At 4.0Ah, the B20LISF is the higher-capacity option in the Storm Force 20V battery range, providing significantly longer runtime per charge than lower-Ah alternatives — making it the better choice for tools used intensively on larger jobs, for extended work sessions away from a power source, or for higher-drain tools such as circular saws and reciprocating saws where battery capacity is depleted more quickly. The lightweight 0.65kg design ensures the battery adds minimal weight to the tool in use, keeping your cordless tools comfortable and well-balanced during extended working periods.

Please note the B20LISF is not compatible with the Draper Storm Force® 10.8V range — it is designed exclusively for use with 20V Storm Force tools.

Key Features

• 4.0Ah Li-Ion battery for extended runtime across the Storm Force 20V range
• Part of the Draper Storm Force® 20V Power Interchange system — compatible with all Storm Force 20V tools
• Higher-capacity 4.0Ah rating for longer working sessions and higher-drain tool applications
• Lightweight at just 0.65kg for comfortable, well-balanced tool handling
• Ideal as a spare, replacement, or additional battery for back-to-back cordless working
• Not compatible with Draper Storm Force® 10.8V tools

Specifications

FAQ Section

What tools is the B20LISF compatible with?
The B20LISF is compatible with all tools in the Draper Storm Force® 20V Power Interchange series. It is not compatible with the Draper Storm Force® 10.8V range. If you are unsure whether your Storm Force tool is 20V or 10.8V, check the tool's voltage rating on the label or in the product documentation before purchasing.

What is the difference between 2.0Ah and 4.0Ah batteries?
The Ah (ampere-hour) rating indicates the battery's energy capacity — a higher Ah rating means more energy stored and therefore longer runtime per charge. A 4.0Ah battery will run approximately twice as long as a 2.0Ah battery on the same tool under the same conditions. The 4.0Ah B20LISF is the better choice for intensive use, high-drain tools, and longer work sessions; a lower-Ah battery may be sufficient for lighter, shorter applications where weight and cost are priorities.

Can I use the B20LISF with any Storm Force 20V tool I already own?
Yes. The Storm Force 20V Power Interchange system is designed so that any 20V Storm Force battery — including the B20LISF — fits and works with any tool in the 20V Storm Force range. This means you can use one battery across multiple tools and invest in additional batteries as your toolkit grows without compatibility concerns.

Why is Li-Ion the preferred battery chemistry for cordless power tools?
Lithium-Ion batteries offer a superior combination of energy density, lightweight construction, low self-discharge rate, and absence of memory effect compared to older NiCd and NiMH battery technologies. Li-Ion batteries hold their charge well during storage, can be charged at any state of charge without degradation, and deliver consistent power output throughout the discharge cycle — making them the standard choice for modern professional and consumer cordless power tools.

Is the B20LISF suitable for high-drain tools like circular saws?
Yes. The 4.0Ah capacity of the B20LISF makes it particularly well suited to higher-drain tools such as circular saws, reciprocating saws, and angle grinders within the Storm Force 20V range, where the greater energy demand of the motor depletes lower-capacity batteries more quickly. The 4.0Ah rating provides the extended runtime needed for productive use of these more demanding tools.

Does the B20LISF come with a charger?
No. The B20LISF is a battery only. A compatible Draper Storm Force® 20V charger is required to charge the battery and is available separately within the Storm Force 20V accessory range.