Backpack Lithium Battery Pack — 20Ah/30Ah, Powers Multiple 21V-60V Tools Simultaneously

Hangzhou Xinabo Intelligent Electromechanical Technology Co., Ltd manufactures the Backpack Lithium Battery Pack — 20Ah/30Ah, Powers Multiple 21V-60V Tools Simultaneously as the runtime platform for our 21V cordless tool family and for compatible tools across the 21V-60V range. Rather than a pocket pack that quits mid-task, it carries 20Ah or 30Ah of high-rate ternary lithium cells on the operator's back and feeds one tool after another through multi-spec adapter interfaces. We supply it as a working kit — pack, harness, adapter cables, charger and carry bag — for construction, outdoor and industrial maintenance crews that need continuous power away from an outlet.

• Rated 21V DC with 20Ah or 30Ah capacity selected at order.
• At least 8 hours of continuous angle grinder runtime and at least 6 hours of rotary hammer runtime per charge.
• 4–6 hour recharge, so one pack per operator covers a shift and refills overnight.
• Fourfold protection — overcharge, over-discharge, short circuit and overheat — plus overload cut-out.
• IP-rated housing for dust and water spray on site.
• Multi-spec adapters matched to mainstream 21V-60V lithium tools.

Built for Continuous Runtime, Not Short Bursts

The pack is rated 21V DC and built on high-rate ternary lithium cells, a chemistry chosen for sustained current delivery rather than headline peak output. Continuous tool work is where that shows: a single charge carries an angle grinder for at least eight hours or a rotary hammer for at least six, duty that would otherwise consume a row of handheld packs and repeated walks back to a charger. Recharge takes four to six hours, which fits overnight charging or a top-up between shifts.

As a cordless power tool manufacturer based in Hangzhou, China, we build the pack alongside the tools it runs, so the adapter set, harness and charger are specified as one system rather than assembled afterwards from unrelated parts.

Specifications and What Each One Changes on Site

Capacity, adapter set and accessories are fixed when the order is configured, so the kit arrives matched to the tools it will actually run.

Where the Pack Earns Its Place

The pack is specified for work where the tool stays in the operator's hands and the nearest outlet is a long walk away.

Tool Matching Across the 21V-60V Range

Adapter cables are matched to the tool's battery interface, not to voltage alone — two tools both rated 21V can still use different connector families. Send the tool list with model numbers and we match the adapter set with the pack.

Our own 21V family — including the XJ.918 21V brushless angle grinder, the XJ.728 heavy-duty rotary hammer and the XJ.570 750N·m impact wrench — connects directly, so one pack covers grinding, anchoring and bolting on the same shift.

Configuration Options We Build To

• Capacity: 20Ah for standard shifts and lighter tool wear; 30Ah where the tool runs most of the working day.
• Adapter set: cables selected per tool model and supplied as a matched set rather than a single universal lead.
• Harness: adjustable shoulder straps carry the pack on the back and leave both hands for the tool.
• Charger: supplied with the kit; input and plug standard confirmed when the order is placed.
• Carry and storage: portable carry bag for transport and off-shift storage.
• Kit scope: full kit, or pack and adapter set where chargers are already held on site.

Protection, Safety and Site Discipline

Protection is handled inside the pack: overcharge, over-discharge, short circuit, overheat and overload cut-outs act before the cells are stressed, which matters when a grinder is pushed hard in summer heat. The housing is IP-rated for dust and water spray, and the harness spreads weight across the shoulders so the operator is not fighting the pack while guiding a tool.

• Charge on a dry, ventilated surface away from grinding sparks and hot work.
• Keep connectors clean and dry, and seat each adapter fully before starting the tool.
• Never carry the pack by the adapter cable or leave it where site traffic can run over it.
• Store at partial charge rather than flat, and top up before a shift after long storage.
• Match the pack to the tool's rated current; sustained overload shortens cell life.

Quality Control, Acceptance and Delivery Scope

Xinabo has built pipe fabrication and cordless tool equipment in Hangzhou, Zhejiang since 2010, holds 30 patents and the National High-Tech Enterprise title, and runs production across a 10,000 m² facility with a 99.9% finished-product rate. Battery kits are assembled and packed against the ordered configuration, so the pack, adapter cables and charger in the box correspond to the tool list on the order.

• The pack label carries rated voltage and capacity, so goods-in inspection can be matched against the purchase order.
• Adapter cables are supplied as a set matched to the tool models listed on the order.
• Protection cut-out can be demonstrated at handover by running a tool until the pack isolates.
• Charger, harness and carry bag appear on the packing list and are counted at handover.
• Carton marking and packing follow the labeling agreed when the order is placed.

Maintenance, Spare Parts and Serviceability

The parts that see the most handling are the straps, adapter cables, charger and carry bag. We supply these as separate order items so a kit stays in service when one component fails, and the pack itself is replaceable without changing the rest of the kit.

• Inspect adapter cables for cracked insulation and bent contacts at each shift change.
• Replace straps when stitching or buckles show wear; a dropped pack is a damaged pack.
• Track runtime per charge — when a pack no longer covers the shift, replace it rather than adding a second charger.
• Keep a spare adapter for the tools used most, so one failed lead does not idle a crew.

Information We Use to Configure Your Solution

A workable proposal comes from the tool list and the shift pattern, not from the pack alone. These are the points we need to fix capacity, adapter set and kit scope.

• Tool models, rated voltage and battery interface for every tool the pack will run.
• How many tools draw from one pack, and whether more than one is connected at a time.
• Typical continuous runtime per shift and the longest single task.
• Site conditions: indoor or outdoor, dust, water spray, ambient temperature.
• Charger input voltage and plug standard for the destination.
• Operator fit for the harness and any PPE the pack must sit over.
• Order quantity, kit or pack-only scope, labeling and packing requirements.
• Delivery destination and the documentation required with the shipment.

Frequently Asked Questions

Can the pack run more than one tool at a time?

The pack carries multiple output interfaces and is built to power several 21V-60V tools from one charge. Where two tools are connected at once, total current draw is the limiting factor, so we match adapter set and capacity to the tools you list.

How long will it run an angle grinder or a rotary hammer?

A single charge supports at least eight hours of continuous angle grinder work or at least six hours of continuous rotary hammer work. Actual site time depends on load, material and how hard the tool is pushed; the 30Ah pack is the choice where the tool runs most of the day.

Will it power my existing 21V tools?

The multi-spec adapter interfaces are compatible with mainstream lithium-ion tools in the 21V-60V range. Compatibility is decided by the tool's battery interface rather than voltage alone, so we match adapters against the model numbers you send.

How long does charging take?

Four to six hours from empty, which suits overnight charging or a top-up between shifts. One pack per operator covers a normal working shift.

What is included in the kit?

Backpack straps, adapter cables, charger and a portable carry bag, with the pack in 20Ah or 30Ah. Pack-and-adapter sets are available where chargers are already held on site.

Is the pack suitable for outdoor and wet conditions?

The housing is IP-rated for dust and water spray, which covers outdoor installation, municipal and forestry work. It is a wearable pack rather than a submersible one, and we confirm the rating against your site conditions when the order is configured.