Marlborough, MA · Founded 2019 · Privately Held (backing)
Developer of batteries designed to reduce waste within the existing energy infrastructure and unlock the potential of renewables for a sustainable future. XL Batteries is based in Marlborough, MA and was founded in 2019. Its last reported valuation was $44 million in Feb 2023. It has raised $34.7 million across 3 recorded rounds; the latest was a $7.5 million early-stage round in Aug 2025.
Last reported valuation
$44.0M
Oct 2026
Priced at
—
Total raised
$34.7M
Last round
Early Stage VC
Aug 2025
Team — not yet on record
No current team members for XL Batteries are on record yet. People surface from round filings, company disclosures, and coverage sessions.
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·The complete investor list: 16 names
·Watch XL Batteries: the Monday email on marks, rounds and moves
