{"product_id":"wlb40-usb-c-rechargeable-li-ion-battery-4-000mah","title":"WLB40 USB-C Rechargeable Li-ion Battery (4,000mAh)","description":"\u003cdiv class=\"prodwrap-section\"\u003e\n\u003cdiv class=\"rightvideo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0207\/6514\/files\/2026082711325061548.webp\" alt=\"WLB40 - USB-C rechargeable work Li-ion battery 4Ah - Nitecore Singapore\"\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lefttext\"\u003e\n\u003ch2\u003eA charged spare for your NWH20, ready to swap\u003c\/h2\u003e\n\u003cp\u003e\u003cb\u003eThe WLB40 is the battery that powers the NWH20 work headlamp. Keep a second one charged and you swap in fresh power in seconds instead of waiting on a cable, so a long shift never stops for a flat battery.\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e4,000mAh at 3.6V, 14.4Wh of capacity\u003c\/li\u003e\n\u003cli\u003eUSB-C charging port built into the battery, no cradle or external charger needed\u003c\/li\u003e\n\u003cli\u003eRecharges in about four hours from a standard 5V\/1A adapter\u003c\/li\u003e\n\u003cli\u003eThree blue indicators show the remaining charge at the press of a button\u003c\/li\u003e\n\u003cli\u003e64 grams, 80.5mm long by 24mm across\u003c\/li\u003e\n\u003cli\u003eDesigned for Nitecore work lights, including the NWH20\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\n\u003cdiv class=\"prodwrap-section\"\u003e\n\u003cdiv class=\"leftvideo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0207\/6514\/files\/2026082711325137006.webp\" alt=\"WLB40 - 4Ah high capacity for extended runtime - Nitecore Singapore\"\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"righttext\"\u003e\n\u003ch2\u003e4,000mAh of steady, lasting power\u003c\/h2\u003e\n\u003cp\u003e\u003cb\u003eFourteen and a half watt-hours of capacity keeps a work headlamp running through the long, low and mid settings where most of a shift is spent.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIn the NWH20 that is up to 12 hours at 300 lumens or 51 hours at the 40 lumen setting on a single pack. A stable output holds performance level rather than fading as the charge drops.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\n\u003cdiv class=\"prodwrap-section\"\u003e\n\u003cdiv class=\"rightvideo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0207\/6514\/files\/2026082711325175063.webp\" alt=\"WLB40 - USB-C rechargeable, universal charging with no extra charger - Nitecore Singapore\"\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lefttext\"\u003e\n\u003ch2\u003eRecharge over USB-C, no cradle to carry\u003c\/h2\u003e\n\u003cp\u003e\u003cb\u003eThe USB-C port sits on the battery itself, so it charges from the same cable and adapter you already use for a phone.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eA full charge takes about four hours from a 5V\/1A adapter. The indicator by the port flashes blue while charging and turns steady blue once the pack is full, so you can see at a glance when it is ready.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\n\u003cdiv class=\"prodwrap-section\"\u003e\n\u003cdiv class=\"leftvideo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0207\/6514\/files\/2026082711325121815.webp\" alt=\"WLB40 - battery level indicator shows remaining charge at a glance - Nitecore Singapore\"\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"righttext\"\u003e\n\u003ch2\u003eKnow the charge before you head out\u003c\/h2\u003e\n\u003cp\u003e\u003cb\u003eA short press of the indicator button lights the three blue LEDs to show how much is left, then they switch off after ten seconds.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eThree steady lights mean 67 to 100 percent, two mean 34 to 66, and one means 11 to 33. A single flashing light means the pack is at 10 percent or below and due for a charge. It takes the guesswork out of which spare to grab.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\n\u003cdiv class=\"prodwrap-section\"\u003e\n\u003cdiv class=\"rightvideo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0207\/6514\/files\/2026082711325294092.webp\" alt=\"WLB40 - safe and reliable with multiple global certifications - Nitecore Singapore\"\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"lefttext\"\u003e\n\u003ch2\u003eSafe and reliable\u003c\/h2\u003e\n\u003cp\u003eThe WLB40 carries multiple global certifications, so it meets recognised safety standards for a Li-ion pack that rides on your head all day. It is built as a genuine Nitecore power solution rather than an unbranded cell, which is what you want in a battery that charges over USB-C and works in wet, dusty conditions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\n\u003cdiv class=\"prodwrap-section\"\u003e\n\u003cdiv class=\"leftvideo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0207\/6514\/files\/2026082711282064824.png\" alt=\"WLB40 - dedicated power solution for Nitecore work lights including the NWH20 - Nitecore Singapore\"\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"righttext\"\u003e\n\u003ch2\u003eMade for Nitecore work lights\u003c\/h2\u003e\n\u003cp\u003e\u003cb\u003eThis is the dedicated pack for Nitecore work lighting, and the same battery that ships inside the NWH20 headlamp.\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eIf you run the NWH20, a spare WLB40 means one charges while the other works. The pack is 80.5mm long and 24mm across with a fixed orientation, so before using it in another light, check that model's manual or battery compartment to confirm it takes the WLB40.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\n\u003cdiv class=\"prodwrap-section-tech\"\u003e\n\u003cdiv class=\"leftvideo\"\u003e\n\u003ch4\u003eTECHNICAL SPECIFICATIONS\u003c\/h4\u003e\n\u003ctable id=\"details_table\" width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eModel\u003c\/td\u003e\n\u003ctd\u003eNITECORE WLB40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eType\u003c\/td\u003e\n\u003ctd\u003eRechargeable Li-ion battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e4,000mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eRated Energy\u003c\/td\u003e\n\u003ctd\u003e14.4Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e3.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eCharging Port\u003c\/td\u003e\n\u003ctd\u003eUSB-C (on the battery)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eCharging Time\u003c\/td\u003e\n\u003ctd\u003eApprox. 4 hours (5V\/1A adapter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eCharge Indicator\u003c\/td\u003e\n\u003ctd\u003e3 blue LEDs (press to check); flashing while charging, steady when full\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eLength\u003c\/td\u003e\n\u003ctd\u003e80.5mm ±0.3mm (3.17\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e24mm ±0.3mm (0.94\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e64g \/ 2.26 oz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eSafety\u003c\/td\u003e\n\u003ctd\u003eMultiple global certifications (CE and more)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd id=\"details_head\" width=\"42%\"\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eNitecore work lights, including the NWH20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"righttext\"\u003e\n\u003ch4\u003eFREQUENTLY ASKED QUESTIONS\u003c\/h4\u003e\n\u003cdiv style=\"max-width: 800px; margin: 0 auto;\"\u003e\n  \u003cdiv style=\"border-bottom: 1px solid #e5e5e5; padding-bottom: 25px; margin-bottom: 30px;\"\u003e\n    \u003cb\u003eCan I charge the WLB40 on its own, outside the headlamp?\u003c\/b\u003e\n    \u003cp\u003eYes. The USB-C port is on the battery itself, so it charges as a standalone pack from any USB-C cable and a 5V\/1A adapter, taking about four hours. That is what lets you charge one while a second runs in the light.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"border-bottom: 1px solid #e5e5e5; padding-bottom: 25px; margin-bottom: 30px;\"\u003e\n    \u003cb\u003eWill it fit my other Nitecore lights?\u003c\/b\u003e\n    \u003cp\u003eThe WLB40 is the dedicated pack for Nitecore work lights and is the battery supplied with the NWH20. It measures 80.5mm by 24mm and installs in one orientation, so check your model's manual or battery compartment to confirm it takes the WLB40 before ordering.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"padding-bottom: 25px; margin-bottom: 30px;\"\u003e\n    \u003cb\u003eHow do I tell when it is fully charged?\u003c\/b\u003e\n    \u003cp\u003eThe indicator by the USB-C port flashes blue while charging and turns to a steady blue once the pack is full. A separate short press of the indicator button shows the remaining charge on three blue LEDs at any time.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"prodwrap-section\"\u003e\n\u003cdiv class=\"leftvideo\"\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0207\/6514\/files\/2026082711280920164.png\" alt=\"WLB40 - USB-C rechargeable Li-ion battery - Nitecore Singapore\"\u003e\u003cbr\u003e\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"righttext\"\u003e\n\u003ch3\u003eWhat's In The Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cb\u003e1x NITECORE WLB40 Battery (4,000mAh)\u003c\/b\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"margin-top: 20px;\"\u003eKeep one charged, and the light never stops.\u003c\/h3\u003e\n\u003ca href=\"#\" class=\"btn\" style=\"display: inline-block; padding: 12px 24px; background-color: #03ae78; color: white; text-decoration: none; font-weight: bold; border-radius: 4px; font-size: 18px;\"\u003eAdd to cart\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n","brand":"Nitecore","offers":[{"title":"Default Title","offer_id":48792983634174,"sku":"WLB40X1","price":69.0,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0207\/6514\/files\/2026082711280920164.png?v=1787894804","url":"https:\/\/www.nitecorelights.com\/products\/wlb40-usb-c-rechargeable-li-ion-battery-4-000mah","provider":"Nitecore Singapore","version":"1.0","type":"link"}