Kobalt 40V 8.0Ah Battery (KB 840-03) is a battery from Kobalt 40V. It is labelled 40 V, holds 8 Ah, weighs 3 lb, and has a 3-year limited warranty.
| Category | Batteries |
|---|---|
| Model number | KB 840-03lowes.com (archived) |
| Voltage on the label ? | 40 Vlowes.com |
| Capacity | 8 Ahlowes.com (archived) |
| Energy ? | — |
| Weight ? | 3 lblowes.com (archived) |
| Warranty | 3 yrlowes.com (archived) |
| Sold as | Single product |
| Availability | Exclusive to Lowe's |
Batteries from other platforms
Only Kobalt 40V batteries. We have no source saying another platform's pack runs Kobalt 40V tools, or that Kobalt 40V packs run anything else. Brands shape their battery rails so a competitor's pack won't fit.
Which batteries work with Kobalt 40V · Every battery fit across platforms
Where this came from
confirmed The part number and every spec shown were read from the brand's or a store's own material: a product page, a spec sheet or a product feed, or an archived copy of one. Last verified 2026-10-11. What the labels mean.
The same tool on other platforms
Same category, different brand. Open any of them side by side with this battery, or tick several to compare up to four.
| Logo | Brand | Product | Category | Photo | Price |
|---|---|---|---|---|---|
| BLACK+DECKER | 2.0Ah Battery BLACK+DECKER 40V MAX Side by side → | Batteries | $89.00 | ||
| BLACK+DECKER | 2.5Ah Battery BLACK+DECKER 40V MAX Side by side → | Batteries | $99.00 | ||
| BLACK+DECKER | 1.5Ah Battery BLACK+DECKER 40V MAX Side by side → | Batteries | $79.00 | ||
| Craftsman | 2.5Ah Battery Craftsman V60 Side by side → | Batteries | — | ||
| Craftsman | 5.0Ah Battery Craftsman V60 Side by side → | Batteries | — | ||
| Craftsman | 7.5Ah Battery Craftsman V60 Side by side → | Batteries | — | ||
| Craftsman | 4.0Ah Battery Craftsman V20 Side by side → | Batteries | — | ||
| Craftsman | 2.0Ah Battery Craftsman V20 Side by side → | Batteries | — |
