The HP CS03XL Laptop Battery is available at Mascom International for KSh 3,250, a brand new replacement battery rated at 11.4V and 3400mAh for the HP EliteBook 840 G3 and its siblings. It fits the EliteBook 840 G3 whether yours runs a Core i5 or a Core i7, along with the EliteBook 745 G3, 755 G3, 848 G3 and 850 G3 and the ZBook 15u G3. The HP CS03XL Laptop Battery is a three-cell lithium-ion pack that sits inside the laptop under the bottom cover. Find it at our store on the first floor of Old Mutual Building, Kimathi Street, Nairobi CBD.
Built for lawyers, doctors, estate agents, logistics coordinators and university students across Kenya, the HP CS03XL Laptop Battery serves one of the most popular used business laptops in the country. The EliteBook 840 G3 earned that place with a slim aluminium body, a good keyboard and a fair price, and thousands now run in offices from Upper Hill to Westlands. Most of those units carry their original battery, and many now last under an hour unplugged or show HP's low-capacity warning at start-up. A fresh pack brings back a full morning of meetings, lectures or site visits away from a socket.
Where most Nairobi electronics shops sell a battery by the laptop's name alone, Mascom International checks the CS03XL code and HP part number first. Buyers throughout Kenya report that 840 G3 batteries are easy to confuse with the different packs used in some later G4 models, so we confirm before you pay. Send the code from your old battery or the laptop's model sticker on WhatsApp, or bring the laptop so the team can check the HP CS03XL Laptop Battery fits at the counter. With pay-on-arrival delivery to all 47 counties, a buyer in Mombasa or Eldoret pays only when the HP CS03XL Laptop Battery arrives.
Common Questions About the HP CS03XL Laptop Battery
How much is the HP CS03XL Laptop Battery in Kenya?
The HP CS03XL Laptop Battery costs KSh 3,250 at Mascom International in Nairobi CBD, sold as a fresh replacement part. The price covers one 11.4V, 3400mAh three-cell battery and a 6-month warranty against manufacturing defects. It comes without a charger, since it draws power from the laptop's existing HP adapter. Delivery anywhere in Kenya is pay-on-arrival. For comparison, the older EliteBook 8460p battery in the same Mascom International range costs KSh 2,450, which is KSh 800 less.
Which laptops does the HP CS03XL Laptop Battery fit?
The HP CS03XL Laptop Battery fits the HP EliteBook 745 G3, 755 G3, 840 G3, 848 G3 and 850 G3, plus the ZBook 15u G3 mobile workstation. Some G4 machines, including the ZBook 15u G4, take it too, while many EliteBook 840 G4 and 850 G4 units use a different battery. Labels showing CS03XL, HSTNN-IB6Y, 800513-001, 800231-141 or T7B32AA confirm a match. When in doubt, send a photo of the old battery label to Mascom International on WhatsApp.
Does the HP CS03XL Laptop Battery work on both the Core i5 and Core i7 EliteBook 840 G3?
Yes, the HP CS03XL Laptop Battery fits every EliteBook 840 G3, whatever processor, memory or screen it carries. HP used one battery bay and one connector across the whole 840 G3 range, so a Core i5 office unit and a Core i7 unit take the same pack. Runtime does differ: a Core i7 with a touchscreen usually drains faster than a Core i5 with a standard screen. Screen brightness and your workload affect runtime more than the processor badge does.
Should I buy the HP CS03XL Laptop Battery or the HP HT03XL Laptop Battery?
Choose the HP CS03XL Laptop Battery for EliteBook G3 business laptops and the ZBook 15u G3; choose the HP HT03XL Laptop Battery for consumer HP models such as the HP 250 G7 and the 15-da series. Both cost KSh 3,250 at Mascom International and both end in 03XL, which is why buyers mix them up. Their shapes and connectors are different, so neither fits the other's laptop. The model sticker under your laptop tells you which one you need.
Is the HP CS03XL Laptop Battery safe in Kenyan heat and coastal humidity?
Yes, the HP CS03XL Laptop Battery handles normal Kenyan conditions, from Nairobi offices to humid Mombasa and Kilifi homes, when the laptop is used sensibly. Heat is the real enemy of lithium cells, so keep the vents clear and never leave the laptop in a car parked in the sun. Watch for warning signs on any old battery: a raised touchpad, a bulging bottom cover or a laptop that rocks on a flat desk. Stop using a swollen battery and replace it promptly.
Who should buy the HP CS03XL Laptop Battery, and who should skip it?
Buy the HP CS03XL Laptop Battery if your EliteBook 840 G3 or sibling runs well but dies quickly off the charger or shows HP's battery warning at start-up. Skip it if your laptop is an EliteBook 840 G5 or newer, which takes a different battery that this batch does not include. Also skip it if the laptop will not charge with a known-good adapter, since a faulty charging circuit, not the battery, may be the cause.
Is the HP CS03XL Laptop Battery hard to fit, since it sits inside the laptop?
Fitting the HP CS03XL Laptop Battery means opening the bottom cover, so it takes more care than a clip-in pack. Owners comfortable with a small Phillips screwdriver can shut the laptop down, loosen the captive screws on the base, lift the cover, unplug and remove the old battery, then fit the new one in reverse order. If you prefer not to open the laptop yourself, bring it to the Mascom International counter so the team can check the fit with you.
Can I run an EliteBook 840 G3 plugged in all day without a working battery?
Technically yes, but an EliteBook 840 G3 without a healthy battery switches off the moment power drops, and that is a real risk with KPLC outages. Every flicker means lost unsaved work, and repeated hard shutdowns can corrupt files or Windows updates. A working HP CS03XL Laptop Battery acts as a built-in backup, giving you time to save and close properly. It also lets you carry the laptop between rooms or onto a boda boda ride without restarting it.
Technical Specifications
Cell and Capacity
- 11.4V nominal voltage — matches the power rating of the battery the EliteBook 840 G3 shipped with, so charging works normally.
- 3400mAh rated capacity — mAh, or milliamp-hours, measures stored charge, here equal to a full-size EliteBook G3 pack.
- Three-cell lithium-ion construction — the standard CS03XL layout, slim enough to sit under the bottom cover of a thin laptop.
- Fresh cells with no prior charge cycles — full usable capacity from the first charge, unlike packs salvaged from scrapped laptops.
- No memory effect — short top-ups between client meetings do not reduce the charge the pack can hold later.
Compatibility and Model Matching
- HP EliteBook 840 G3 — the 14-inch business laptop this battery is best known for, in Core i5 and Core i7 versions.
- HP EliteBook 745 G3 and 755 G3 — the AMD-powered siblings of the 840 G3 and 850 G3, sharing the same battery.
- HP EliteBook 848 G3 and 850 G3 — the other Intel members of the G3 family, using the identical bay and connector.
- HP ZBook 15u G3, plus the ZBook 15u G4 — HP's slim mobile workstations built on the same chassis as the EliteBook 850 G3.
- Matching part numbers — CS03XL, HSTNN-IB6Y, 800513-001, 800231-141 and T7B32AA appear on compatible original labels.
- G4 caution — many EliteBook 840 G4 and 850 G4 units use a different battery, so check the old label before ordering.
Build and Safety
- Internal mounting under the bottom cover — protected inside the laptop body, away from knocks and dust during daily carrying.
- Screw-secured fitting — the pack is fastened inside the chassis, so it cannot shift or rattle when the laptop is moved.
- Keyed connector — plugs straight into the laptop's mainboard socket in one orientation, preventing reversed fitting.
- Protection circuit built into the pack — standard on lithium-ion laptop batteries, it stops charging when the cells are full.
- Flat profile — sits level inside the chassis, so the bottom cover closes flush with no gap or bulge when fitted correctly.
- Counter fit check on request — bring the laptop to Mascom International and the team checks the match before you pay.
Charging and Everyday Use
- Charges through the laptop's HP adapter — the 4.5mm blue-tip HP adapter used by the EliteBook 840 G3 powers it fully.
- Charges while you work — keep writing reports or joining video calls as the battery fills in the background.
- Battery status in Windows — the taskbar icon shows percentage and estimated time left once the new pack is connected.
- One full charge early on — helps the laptop's battery meter learn the new pack and report accurate figures from then on.
- Store half-charged if the laptop sits unused — a battery left completely flat for weeks can stop accepting a charge.
- Keep vents clear — heat ages lithium cells faster, so avoid soft surfaces, direct sun and parked cars.
Inclusions
- One CS03XL replacement battery — the only item in the package, ready to fit inside a matching HP laptop.
- No charger supplied — the pack charges from the laptop's adapter, and HP adapters are sold separately at Mascom International.
- No screwdriver supplied — a small Phillips screwdriver is needed to open the bottom cover of the laptop.
- 6-month warranty cover — protects against manufacturing defects, with claims handled at the Nairobi CBD service desk.
- Free code check before purchase — send the code on your old battery over WhatsApp and the team confirms the match.
Package Contents
The HP CS03XL Laptop Battery comes alone: one replacement battery and nothing else in the package. There is no charger, because the battery draws power from the HP adapter your laptop already uses. If your adapter is missing or no longer charges, compatible HP laptop adapters are sold separately at Mascom International. No screwdriver comes with it, so have a small Phillips screwdriver ready for the bottom cover. Keep your receipt to support a warranty claim.
Warranty
Mascom International backs the HP CS03XL Laptop Battery with a 6-month warranty covering manufacturing defects, including a pack that fails to charge or loses charge abnormally under normal use. Bring any claim to our Nairobi CBD service desk on the first floor of Old Mutual Building, Kimathi Street.
Where to Buy the HP CS03XL Laptop Battery in Kenya
The HP CS03XL Laptop Battery is in stock at Mascom International, Old Mutual Building, First Floor Room 4, Kimathi Street, Nairobi CBD. Visit Monday through Saturday, 9:00 AM to 7:00 PM, and bring your EliteBook so the team can check the fit with you before you pay. The battery comes in black.
Questions about stock, codes or orders can reach us through:
- Phone/WhatsApp: +254 708 852 521
- Email: info@mascomintl.com
- Website: www.mascomintl.com
Every order ships pay-on-arrival to all 47 counties. Nairobi and its environs receive same-day delivery, and buyers in Mombasa, Kisumu, Eldoret, Nyeri and Malindi get theirs the next business day. Mandera, Wajir, Marsabit, Lamu, Tana River, and Turkana receive delivery within 2-3 business days.
The battery is backed by the 6-month warranty explained above. Expect honest specifications, accurate pricing and after-sales support that stays with you long after the sale.
