Kobalt KHB 4248-06 48V blower kit review

The Kobalt KHB 4248-06 is the 48V MAX (24V × 2) handheld blower kit at Lowe’s item 6037886. Its page lists two 4.0 Ah batteries and one charger, and the manual confirms that the blower requires two Kobalt 24V batteries at once. The item page now says it is no longer sold. More importantly, the U.S. CPSC recall table names this exact blower kit with KB 424-06 batteries. Keep this review as an identification and comparison reference, not a purchase recommendation; check any physical battery against the recall instructions before use.

Two 24V packs operate together

The “48V” label describes a pair of 24V packs working together, not a single battery that can be swapped into an ordinary one-pack 24V blower. The manual shows two battery compartments and says both batteries are needed for operation. The exact Lowe’s kit is listed with two 4.0 Ah batteries and one charger. That gives an owner a complete original package on paper, but it also means the tool depends on a matched pair of compatible packs. If one pack is missing, damaged, or under recall, the blower is not a usable one-battery backup.

The older 32-page manual identifies KHB 4248-06 and item 6037886 alongside the related tool-only KHB 6048-06/item 7915898. Those are separate retail configurations: the reviewed item is the two-battery kit, not the bare tool. The manual’s approved-battery list is broad, but it does not prove the exact revision or serial details of every battery shipped in the kit. Do not infer pack identity from the 4.0 Ah capacity or from the product image.

Rated output is substantial, but not a clearing-time promise

Kobalt’s page and the linked manual specify up to 600 CFM and 150 MPH. Those are maximum airflow and air-speed ratings; they are not a measured comparison of how quickly the blower clears a particular yard, wet leaves, or packed debris. Lowe’s also describes up to 90 minutes of average runtime, but the listing does not tie that estimate to a speed setting, trigger duty cycle, or a stated test method. Treat it as a manufacturer claim rather than a guarantee for a full cleanup session.

For a handheld blower, the two-pack layout is the defining tradeoff: it reaches a higher published output than the small one-battery Kobalt 24V blowers, but it asks you to carry and maintain two packs together. The product page lists 9.9 lb without explaining whether that figure includes batteries. It is not a confirmed bare-tool weight, and the combined working weight is not established by the manual. If a strict handling limit matters, this model cannot satisfy it on the evidence available.

Controls and nozzle setup

The manual describes a trigger plus a power/cruise-control/speed-adjusting button. It cycles through speed settings and can hold a selected setting in cruise mode; a two-second press turns the blower off. The kit includes a blower tube and one concentrator nozzle. The manual says attaching the nozzle provides higher air speed, so it is a simple choice between the standard tube setup and a narrower, faster stream—not a documented vacuum, mulcher, or multi-nozzle system. The product page does not list a collection bag, and the manual’s contents do not identify one.

For ordinary cleanup, Kobalt’s manual advises working around the edge of a debris pile rather than blowing straight into its center, and using rakes or brooms to loosen material first. It also calls for eye and hearing protection, keeping bystanders away, and keeping the air vents clear. This is practical handheld guidance, not evidence that the machine has been tested on a specific property size.

The recall is decisive

CPSC recall 26-611 lists the Kobalt 48V (2 × 24V) 600-CFM/150-MPH blower kit, model KHB 4248-06, with two 4.0 Ah batteries identified as KB 424-06. The notice limits the hazard to batteries with a USB-C charging port: charging such a battery through that port while it is installed in the yard tool can cause a short circuit and fire risk. CPSC instructs consumers to stop in-tool USB-C charging for affected packs and contact Greenworks Tools for the replacement remedy. Check the model and port on the actual battery and follow the current official notice; the listing photo cannot clear a particular pack. Because the exact kit is named in the recall and the item is no longer sold, this profile is excluded from buying matches.

What to compare instead

If you want a handheld blower with more than 600 CFM, the EGO LB7654 is a useful separate comparison at a published 765 CFM, but it uses its own battery platform and a different one-pack configuration. If receiving two batteries in a kit matters most, Greenworks’ BPB40L520-00 is a two-pack 40V backpack configuration; its carrying format is not the same as a handheld. The smaller Kobalt KHB 324-06A is another distinct 24V handheld kit with one listed 3.0 Ah battery, but its own included-pack revision is also not established. None of these is the KHB 4248-06 under a new label, and none changes the recall status of this exact kit.

Bottom line

The KHB 4248-06’s identity and original package are clear: a 600-CFM, 150-MPH handheld blower that uses two 24V batteries, with two 4.0 Ah packs and one charger in the kit. The airflow, speed hold, and included pair make it a useful reference when comparing dual-battery layouts. But the 9.9-lb figure has no stated weight basis, the runtime figure is not tied to a work setting, and CPSC specifically names the model and its KB 424-06 packs in recall 26-611. Use the product page and manual to identify an existing unit; do not treat the old kit as a purchase-ready recommendation or a battery-safety clearance.