UFO-KB440 40V 3.0Ah-6.0Ah Lithium-Ion Battery for Kobalt Garden Tools_Electric tool Battery_PRODUCTS

OVERVIEW

UFO-KB440 40V 3.0Ah-6.0Ah Lithium-Ion Battery for Kobalt Garden Tools

The UFOPOWER UFO-KB440 is a 40V lithium-ion replacement battery for Kobalt 40V Max cordless garden tools, including weed eaters, mowers, chainsaws, blowers and trimmers. It is interchangeable with Kobalt 40V batteries such as KB540-06, KB2540C-06, KB440-03, KB640-03, KB240-06, KB240C-06, KB640-06, KB245-06, KRC40-06, KB440C-06, KRC60 and KRC40-06.

Configured with 20 high-energy-density 18650 cells in a 10S2P array, the UFO-KB440 is available in 3.0Ah, 4.0Ah, 5.0Ah and 6.0Ah capacities, delivering a continuous output of 40A (1440W) with up to 216Wh of energy for extended runtime.

UFOPOWER is a professional battery manufacturer with in-house R&D and quality-controlled production lines. As an OEM/ODM battery factory, we offer custom branding including color, labels and retail packaging, so this 40V garden tool battery can be tailored to your brand.

Product Details

Key specifications of the UFO-KB440 40V lithium-ion battery pack:

Parameter	Specification
Nominal Voltage	40V
Capacity	3.0Ah / 4.0Ah / 5.0Ah / 6.0Ah (optional)
Watt-Hours	120Wh / 160Wh / 200Wh / 240Wh (optional)
Battery Type	Lithium-ion (18650 cells)
Cell Array / Total Cells	10S2P / 20 cells
Full Charge Voltage	42V
End of Discharge	27V
Max. Continuous Discharge	40A (1440W), customizable
Cycle Life	800 – 1000 cycles
Weight	1.4kg (3.09 lb)
Dimensions (L×W×H)	–
Operating Temperature	0~45°C (charge); 0~55°C (discharge)
Storage Temperature	-15~35°C max; 0~25°C recommended
Housing Material	PC/ABS, UL 94 V-0 flame-retardant
Color	Black + Blue (customizable)
Labels & Stickers	Neutral (customizable)
Place of Origin	Made in China

Compatibility:

Replace part numbers: KB540-06, KB2540C-06, KB440-03, KB640-03, KB240-06, KB240C-06, KB640-06, KB245-06, KRC40-06, KB440C-06, KRC60, KRC40-06
Compatible with Kobalt 40V Max cordless power tools, including 40V weed eater, mower, chainsaw, blower and trimmer
Compatible with original 40V lithium-ion chargers KRC60-06 and KRC40-06

100% Compatibility with Original-Grade Performance

The UFO-KB440 is engineered as a true drop-in replacement for Kobalt 40V Max garden tools, tested on original equipment for a seamless match.

Interchangeable with a wide range of Kobalt 40V battery models (KB240-06, KB640-06, KB245-06 and more). Works with original KRC60-06 and KRC40-06 40V chargers. Each pack is rigorously tested on original tools to ensure consistent compatibility and performance. From design to production, quality standards meet or exceed original battery specifications.

High-Energy Cells & Extended Runtime

With top-grade 18650 cells and flexible capacity options, the UFO-KB440 keeps your garden tools running longer.

20 high-energy-density 18650 cells in a 10S2P configuration. Four capacity options — 3.0Ah, 4.0Ah, 5.0Ah, 6.0Ah — to match your power needs. Continuous discharge of 40A (1440W) for demanding cutting and blowing tasks. Up to 216Wh of energy for extended runtime, with an ultra-long cycle life of 800-1000 cycles.

Safety Protection & Smart Features

The UFO-KB440 is built with multiple layers of protection to keep both battery and tool safe in daily use.

UL 94 V-0 flame-retardant PC/ABS housing for maximum fire and heat protection. Protection circuit module (PCM) guards against overcharge, over-discharge, overload, overheat and short circuit. Integrated LED charge indicator acts as a fuel gauge, so you can monitor battery charge in real time. Factory-direct pricing from our production line, with custom branding (color, labels, packaging) for OEM/ODM projects.