Compare the job first, then the package
Keep both offers inside the same tool class. A handheld power cleaner and a full-size pressure washer can have very different cleaning jobs, even when both run on batteries. Use the cordless pressure-washer comparison to choose the class before comparing bundles.
| What you already have | Start with | What could change the choice |
|---|---|---|
| Enough compatible batteries, the right charger and required fittings | Tool-only offer | A kit promotion may still cost less overall |
| One battery for a tool that requires two | Both complete purchase routes | Include the cost of the missing compatible battery |
| No compatible battery system | Kit alongside a fully priced bare-tool setup | Check what the kit actually includes |
| Accessories you will not use | The package that covers your actual job | Extra pieces do not automatically add value |
A model suffix can change what is in the box
The WORX WG644 family manual, accessories chart on page 6, distinguishes these configurations:
| Documented package contents | WG644 | WG644.9 |
|---|---|---|
| WA3525 battery packs | 2 | Not included |
| WA3770 charger | 1 | Not included |
| Draw hose, lance and multi-spray nozzle | Included | Included |
Page 13 specifies two installed batteries for operation. One compatible pack therefore does not complete the tool-only setup. This is a manual-based example; confirm the exact seller's package before ordering. It does not establish today's price or contents of a different bundle.
See what the upfront total includes
A battery you already own adds no new purchase cost to this comparison if it is suitable and available for the job. Its original purchase price is not a new expense. If sharing it would interrupt another tool you need, include a spare only when you actually plan to buy one.
Compare your two complete totals
Use current prices for your exact offers. Keep unknown amounts blank; enter 0 for a confirmed zero cost. All amounts are US dollars.
Each total = offer price + missing essentials + tax and delivery. Difference = tool-only total − kit total. Already-owned suitable items add no new purchase expense. Inputs stay in this browser and are not saved or sent.
Before filling in the calculator, list each missing item once:
| Cost item | What belongs in your total |
|---|---|
| Batteries | Only the compatible packs you still need, in the required quantity |
| Charger | A suitable charger if neither your existing setup nor the offer supplies it |
| Water connection | Required hose, filter or adapter absent from the package |
| Other job essentials | Only additional items needed for the task you are comparing |
| Tax and delivery | Charges for the whole purchase route, including separately bought essentials |
If a battery-and-charger bundle covers both items, enter its price once. Add those items into each route's missing-essentials subtotal. Enter zero only when you have confirmed there is no additional cost; leave an unknown blank.
The result compares new upfront spending in US dollars. It does not estimate cleaning performance, runtime, future battery replacement, resale value or a cost per use. Optional accessories can be compared separately after both routes cover the same job.
Check compatibility before treating a battery as reusable
Read the model numbers on your battery and charger and compare them with the exact cleaner's instructions. Voltage alone is not a compatibility check. The WORX manual's battery guidance requires designated packs and the specified charger; its accessories footnote lists the supported battery models for this family. Apply the relevant manufacturer's instructions to each offer.
Also check availability: a pack permanently used by another household tool may not be available when you want to clean. Add a planned spare to the total instead of assuming that every battery on the shelf is free to use.
Finish with a ready-to-use setup
For work away from a tap, follow the bucket-compatibility and setup guide. A box containing a hose is not enough to establish that your planned water source, filter and connections are suitable.
Once both packages cover the job, compare their complete totals and decide whether the extra contents serve you. Then use the model details and retailer links in the shortlist to check the exact offer. Recalculate if its model suffix, included parts or checkout total changes.