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Black rectangular laptop battery with connector strip

GreenTechLLC

GreenTechLLC BX03XL 11.58V 56Wh laptop battery

SKU CH-T5RS-8J35A

Replacement 11.58V 56Wh lithium-ion battery for HP EliteBook 830, 835, 840, 845, 860, 865 G11 and Elite x360 830 G11 models

  • Battery type3 Cell Lithium-Ion
  • Battery voltage rating11.58 V
  • Battery capacity4646mah
  • Measurements9.9 × 3.25 × 0.25 in
  • Product colorBlack
  • Product typeBattery
  • Direct replacement for HP EliteBook and ZBook G11 models
  • 56 Wh capacity supports extended mobile work sessions
  • 58 V three-cell lithium-ion design matches original voltage
  • Slim 9.9 × 3.25 × 0.25 in profile fits factory battery bay
  • CE FCC RoHS certified for safe daily operation

Replacement battery for HP EliteBook and ZBook G11

The GreenTechLLC BX03XL is a 3‑cell lithium‑ion pack rated at 11.58 V and 56 Wh (4646 mAh). It replaces OEM part numbers including BX03XL, N59787‑005 and HSTNN‑OB3H for EliteBook 830, 835, 840, 845, 860, 865 G11, Elite x360 830 G11 and ZBook Firefly 16 G11 models.

Verify your laptop model

Match the exact EliteBook or ZBook G11 variant — 13‑inch 830/835, 14‑inch 840/845, 16‑inch 860/865 or the x360 830 2‑in‑1 — and confirm the battery label shows one of the listed OEM numbers such as N59787‑002 or 8L6T4AV. The pack measures 9.9 × 3.25 × 0.25 in and weighs 0.7 lb, so ensure the battery bay matches these dimensions.

Sustained discharge delivers stable voltage

Each unit is tested for correct voltage, circuit protection and stable current under continuous load. CE, FCC and RoHS certification confirms safety compliance during extended use. The 3‑cell design maintains consistent output over long sessions rather than only in short bursts.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $62.99
Pricier than about 90% of the 27,790 comparable items (median $30.99).

Specifications

Product
Brand nameGreenTech
Model nameBX03XL, BX03056XL, BX03056XL-PL, N59787-002, N59787-005, N59733-2D1, N59733-AC1, HSTNN-OB3H, TPN-DB1S, TPN-IB0Y, 8L6T4AV, 8M2V5AV, 8M4V8AV, 8N351AV, 8Q5U5AV, 8R627AV, 8T638AV
Part numberBX03XL, BX03056XL, BX03056XL-PL, N59787-002, N59787-005, N59733-2D1, N59733-AC1, HSTNN-OB3H, TPN-DB1S, TPN-IB0Y, 8L6T4AV, 8M2V5AV, 8M4V8AV, 8N351AV, 8Q5U5AV, 8R627AV, 8T638AV
Product colorBlack
Product typeBattery
Power
Battery type3 Cell Lithium-Ion
Battery voltage rating11.58 V
Battery capacity4646mah
Size & build
Measurements9.9 × 3.25 × 0.25 in
Product weight0.7 lb (0.32 kg)
Compatibility
Compatible withHP ELITEBOOK 830 13 in G11, 830 G11, 835 13 in G11, 835 G11, 840 14 in G11, 840 G11, 845 14 in G11, 845 G11, 860 16 in G11, 860 G11, 865 16 in G11, 865 G11, HP ELITE X360 830 13 in G11 2-IN-1, X360 830 G11 2-IN-1, HP ZBOOK FIREFLY 16 G11

Questions about this item

Does the BX03XL come with installation tools or do I need to buy a screwdriver separately?

The battery ships as a standalone 3 cell lithium-ion unit; no tools or mounting hardware are included, so a small Phillips screwdriver must be sourced separately.

Which part number should I match — BX03XL, N59787-005 or HSTNN-OB3H — for my EliteBook 840 G11?

All three numbers reference the same 11.58V 56.04Wh replacement; any of them will fit the EliteBook 840 G11 listed in the compatibility table.

What does the 56Wh rating actually deliver in an EliteBook 860 16 inch G11?

The 56.04Wh capacity at 11.58V provides the same energy reserve as the original factory pack, giving comparable run-time per charge in the 16 inch G11 chassis.

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