A datacenter UPS battery string is typically rated for 7-10 years of service life, depending on chemistry, manufacturer, and operating conditions. Most large US datacenters built or expanded between 2017 and 2020 — a peak construction window driven by hyperscale buildout — are now hitting that 7-year mark. The result: 2026 and 2027 will see the largest concentrated UPS battery replacement cycle in industry history, with hundreds of millions of dollars in procurement scope opening up over the next 24 months.
This post identifies which operators are most exposed, which battery product families are first to expire, and how UPS battery vendors should be sequencing outreach.
How Battery EOL Forecasting Works
Battery end-of-life is rarely a single hard date. The standard manufacturer service-life rating (7, 8, or 10 years depending on the product) is a midpoint — actual replacement timing varies by:
Cycling frequency. A facility that runs frequent transfer tests or operates in a region with grid instability cycles its batteries more, accelerating wear.
Ambient temperature. A battery room maintained at 77°F lasts close to spec. At 85°F, service life drops 20-30%.
AI-density acceleration. Newer AI training facilities cycle their UPS infrastructure dramatically more than traditional cloud sites. Some operators are reporting effective service life as low as 4-5 years for batteries in AI-dense halls.
Combining install-date data with these multipliers produces a forecast that's accurate within ±6 months for most facilities.
Battery Product Families Hitting EOL in 2026-2027
EnerSys DataSafe HX (installed 2017-2019): The most widely deployed VRLA battery product in US hyperscale and tier-3 colocation. Standardized on by Equinix, Digital Realty, and CyrusOne across hundreds of facilities. The 2017-2019 cohort is the largest single replacement opportunity in the market.
C&D Technologies DCS/UPS12 (installed 2017-2020): Strong installed base at colo operators including Iron Mountain and DataBank. C&D's product page documents the standard 7-10 year service life.
Hawker Powersafe (installed 2018-2020): Common at AWS-operated facilities. Replacement cycle ramping in late 2026.
Yuasa Datasafe (installed 2017-2019): Used by tier-2 colo operators and some enterprise datacenters. Smaller installed base but consistent timing for replacement.
Operators Most Exposed (Public Estimates)
Aggregating install-year data from facility profiles, equipment standardization announcements, and publicly disclosed UPS configurations, the operators with the largest 2026-2027 battery replacement exposure are:
Equinix: Standardized on EnerSys DataSafe HX across most US facilities. With ~85 US facilities (most built or expanded 2017-2020), the company is the single largest battery-replacement target in the country. Multiple sites already in active RFP cycles.
Digital Realty: Mixed product portfolio (EnerSys + Hawker primarily). 130+ US facilities means the replacement footprint is the largest by raw count, though spread across more vendors.
CyrusOne (KKR-owned): EnerSys-heavy standardization. Tighter capex discipline under PE ownership means more competitive bidding — opportunity for new vendors to displace incumbents.
DataBank: Aggressive expansion 2018-2021 means a large 2026-2028 replacement wave. Less standardized than Equinix/Digital Realty, opening room for newer entrants like NorthStar, BAE Systems, and lithium-ion alternatives.
Iron Mountain: Mixed installation history. Smaller per-facility scope but consistent volume.
The Lithium-Ion Conversion Question
A significant minority of operators are using the 2026-2027 replacement cycle as a forcing function to transition from VRLA to lithium-ion (LFP) battery chemistry. Lithium offers 2-3x the cycle life, smaller footprint, and lower long-term TCO — but higher upfront cost and meaningful retrofitting requirements (battery monitoring systems, fire suppression, room layout).
Industry estimates suggest 15-25% of 2026 replacements will be lithium conversions rather than like-for-like VRLA swaps. For VRLA-focused vendors, this is a threat. For lithium-capable vendors, it's a generational expansion opportunity. Data Center Dynamics has solid coverage of the conversion trade-offs.
How Vendors Should Time Outreach
Battery replacement procurement cycles typically run 6-9 months from initial vendor outreach to PO. That means vendors targeting a 2026 replacement opportunity should be in active conversation today; vendors targeting 2027 replacements should be in relationship-building mode now and active proposal mode in late 2026.
The single most actionable signal is install-year data by facility. A vendor selling UPS batteries who has access to install-year records for every facility in their territory can rank prospects by replacement-window confidence — and call the highest-confidence facilities first.
Kova Stack's facility profiles include install-year and brand data for UPS systems and battery strings at thousands of US facilities, so vendors can build EOL-aware target lists. Our vendor sales briefings explicitly rank opportunities by replacement-window confidence.
What to Do This Month
If you sell UPS batteries (VRLA or lithium):
1. Build a target list of every facility in your territory installed or expanded between 2017 and 2019. This is your 12-month opportunity universe.
2. Filter by operator. Equinix and Digital Realty contracts run through corporate procurement. Smaller operators have facility-level decision authority — easier to access, faster cycles.
3. Identify each facility's current battery brand. Replacement contracts overwhelmingly stay with the same chemistry/form-factor; cross-brand displacement requires a clear TCO advantage.
4. Time outreach for 12-18 months before forecasted EOL. Too early and procurement isn't ready; too late and you miss the spec phase.
If you want this work done for you — a ranked list of every battery-replacement opportunity in your territory, with operator, install year, current brand, forecasted EOL date, and verified procurement contact — our Founding Member Pilot delivers exactly this as part of the monthly territory briefing.
Sources & Further Reading
EnerSys DataSafe HX Product Page — Manufacturer service-life specifications and recommended replacement cadence.
Data Center Dynamics: Lithium-Ion vs VRLA for Data Center UPS — Comparative analysis of the chemistry conversion trade-offs.
AFCOM — State of the Datacenter — Annual industry survey covering equipment lifecycle, refresh cadence, and operator standardization trends.