Futurebatt CS03XL battery front view shows compact, reliable power for HP EliteBook models.
Futurebatt CS03XL battery side ports demonstrate easy connection for quick replacement.
Futurebatt CS03XL battery label highlights model and capacity for confident selection.
Futurebatt CS03XL packaging box emphasizes brand trust and ready-to-install battery.
Futurebatt CS03XL packaging contents display essential components for a smooth replacement.
Futurebatt CS03XL assembled cells indicate Grade A quality for efficient charging.
Futurebatt CS03XL safety protections secure safe charging and operation.
Futurebatt CS03XL compatibility list helps users confirm model fit quickly.
Futurebatt CS03XL in-laptop fit-test shows reliable performance in real-world use.

Futurebatt

Futurebatt CS03XL Battery Replacement for HP EliteBook 840/850/755/745 G3/G4 and ZBook 15u G3/G4 – 11.4V 36Wh

Free U.S. shipping and free 30-day returns. Check the compatible models in the description below.

$33.13

In stock. Ships free, usually within 1–4 business days.

Shop Pay installment options may appear at checkout where eligible.

Free shipping Secure checkout Free 30-day returns
Spare Keep a spare (2)

Check the listed compatible models and specs before you order. Questions? Email us.

Multi-device One for each device (3)

Free tracked shipping and secure checkout on every U.S. order.

Free shipping

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Free tracked shipping on every order. Most orders arrive within 3–8 business days.

Free 30-day returns

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Return eligible items within 30 days of delivery for a full refund. We email you a prepaid return label.

Peak-demand shipping delays

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During high demand, deliveries may experience short carrier delays. Tracking updates remain active for every order.

Email support

Questions about fit or an order? Email nexoltic@gmail.com. We reply on business days (Mon–Fri).

Return & RefundFree 30-day returns, full refund Shipping PolicyDelivery process and tracking info
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Product details

Upgrade your portable power with the Futurebatt CS03XL battery replacement. This 36Wh, 11.4V, 3-cell pack is crafted for reliable performance when you need it most. Built with Grade A cells, it supports faster charging and reduced idle drain, helping you stay productive on the go without frequent recharges.

Designed for a broad range of HP laptops, the CS03XL fits several EliteBook and ZBook configurations, making it a practical choice for users who ride the line between mobility and workload. It’s not just a drop-in part; it’s a thoughtfully engineered energy source that aligns with existing hardware and replacement workflows.

What makes it reliable

  • Grade A cells deliver dependable power and longer-lasting performance.
  • 100% brand-new from manufacture with precise manufacturing controls.
  • Fast charging capability paired with low power draw for everyday efficiency.
  • Advanced safety protections, including overcharge, overdischarge, and over-temperature safeguards.

Broad compatibility and safe replacement

  • Compatible part numbers span CS03, CS03046XL, 800231-141, 800513-001, HSTNN-UB6S, TA03XL, and more.
  • Designed for HP EliteBook 840/850/755/745 G3/G4 series and HP ZBook 15u G3/G4 series, plus MT42/MT43 Mobile Thin Client.
  • Strict safety standards and high-quality components reduce risk during installation and use.

What you get from Futurebatt is a credible option to extend uptime. The CS03XL arrives with dependable protection and a commitment to customer support, helping you stay productive without overpromising results.

Support and peace of mind

  • 30-day refund and 12-month replacement for added confidence.
  • 24-hour email support and friendly service from the Futurebatt team.

FAQ

Q: Which devices are compatible with the CS03XL battery?

A: It fits HP EliteBook 840, 850, 755, 745 G3/G4, ZBook 15u G3/G4, MT42/MT43 Thin Clients, and other listed part numbers.

Q: What warranty and support come with the CS03XL battery?

A: 30-day refunds, 12-month replacements, and 24-hour email support from Futurebatt.

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