best-deals.proDeals for the United States
Search
Product guide

LiTHELi U20BY09 20V 4.0Ah Battery Pack

The LiTHELi U20BY09 battery pack is listed as a 20V, 4.0Ah rechargeable lithium-ion replacement for U20 power tools. Its listing also describes USB-C charging for personal electronics, but the package contents are not specified.

At a glance

  • Listed as a replacement battery for LiTHELi U20 tools.
  • Product details specify 20 volts and 4 amp-hours.
  • The feature description claims up to 45W output and a two-way USB-C port for charging electronics.
  • The listing claims a 20,000mAh capacity and estimates up to 0.8 laptop, 1.8 phone, or 1.2 iPad charges, and 20 minutes of garden-tool operation.
Price
$29.99Save 40%

Reference price: $49.99

Price checked: Nov 14, 2026

View offer

Often bought together

Pros and cons

Pros

  • Combines a listed U20 tool battery with a two-way USB-C port for charging compatible electronics.
  • The 4 amp-hour capacity is explicitly stated in the product details.

Technical specifications

13 specifications
Identity
BrandLiTHELi
ModelU20BY09
Power and battery
Battery typeLithium Ion
Capacity4 amp_hours
Voltage20 volts
RechargeableRechargeable
Amperage4 A
Listed outputs and uses
USB-C output claimup to 45W
USB-C porttwo-way USB-C input/output port
Power-bank capacity claim20,000mAh
Recommended useIndoor/Outdoor
Dimensions and installation
Dimensions listed6.1 x 4.1 x 2 inches
Weight listed1.1 pounds

What to know before buying

Listing details to confirm

The listing is inconsistent about battery count and capacity: product details say five lithium-ion batteries are included and specify 4 amp-hours, while the features describe a 20,000mAh U20 SUPER BATTERY. Confirm the selected product's exact configuration and whether it is the USB-C U-Battery Plus before buying. The listing does not provide an explicit package inventory.

Who is it for?

A good fit for

  • Owners of LiTHELi U20 tools seeking a listed 20V replacement battery.
  • Buyers interested in using a battery pack for compatible electronics through USB-C, after confirming this listing's exact configuration.

Less suited to

  • Buyers who need a confirmed package inventory or verified USB-C capability for the exact selected battery.
LiTHELi U20BY09 20V 4.0Ah Battery Pack · photo 2
Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 35 ratings
  • 5 stars70%70%
  • 4 stars16%16%
  • 3 stars6%6%
  • 2 stars0%0%
  • 1 star8%8%

Aggregate ratings lean positive, with most ratings in the five-star category, but a smaller portion are one-star and some are mid-range. Without written customer feedback, the ratings do not explain what buyers liked or disliked. They should not resolve the listing's uncertainty about whether this is the USB-C-capable configuration.

Frequently asked questions

Which tools is this battery listed for?

The listing describes it as a replacement for LiTHELi U20 power tools. It does not establish compatibility with other tool platforms.

Does it charge phones or laptops over USB-C?

The feature text claims a two-way USB-C input/output port and up to 45W output. Because the listing also describes differing battery configurations, confirm that the selected item includes this capability.

How many batteries are included?

The product details claim five lithium-ion batteries are included, but no explicit package inventory is supplied. The listing also describes a singular battery pack, so confirm the selected listing's contents.

LiTHELi U20BY09 20V 4.0Ah Battery Pack · photo 3
Additional product photo 3

Alternative options

Product details in Markdown