{"product_id":"kastar-4-pack-cga-du21-battery-replacement-high-capacity-pack","title":"Kastar 4-Pack CGA-DU21 Battery Replacement - High Capacity Pack","description":"\u003cp\u003eIn this review the Kastar 4-Pack CGA-DU21 replacement batteries are evaluated for owners of older Panasonic camcorders who need reliable runtime without paying for brand-name packs. The bottom line: this 4-pack delivers a clear win for long recording sessions thanks to its stated \u003cstrong\u003e2900mAh high capacity\u003c\/strong\u003e cells and built-in protection circuitry, making it an attractive, lower-cost alternative for anyone who shoots video on NV-GS series cameras and compatible models.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh capacity:\u003c\/strong\u003e The 2900mAh rating provides extended run time compared with many original batteries, so users can record longer between charges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed to replace Panasonic CGA-DU21, CGA-DU14, CGA-DU12, CGA-DU07 and related models and to work with many NV-GS series cameras for broad device coverage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety protections:\u003c\/strong\u003e Built-in over-charge, over-discharge, over-current and over-heating protection helps keep the camera and battery safer during use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustry standards:\u003c\/strong\u003e Cells meet UL1642 and CE safety standards, which is reassuring for photographers and videographers concerned about quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValue pack:\u003c\/strong\u003e The four-battery bundle reduces ongoing cost and the need to buy single replacements repeatedly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe Kastar 4-Pack is aimed at videographers, hobbyists and owners of Panasonic NV-GS series cameras who want longer shooting sessions without swapping batteries frequently. It is especially useful for users who travel or shoot events and need multiple charged spares ready to go.\u003c\/p\u003e\u003cp\u003eThose who prefer factory-original batteries for warranty, certification specifics, or the absolute lightest OEM match may look elsewhere, but if cost-per-hour and safety circuitry are priorities, this pack is a practical choice.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigher 2900mAh capacity gives noticeably longer run time compared with many older replacements.\u003c\/li\u003e\n\u003cli\u003eIncludes protection circuits for over-charge, over-discharge and over-current, improving day-to-day safety.\u003c\/li\u003e\n\u003cli\u003eFour batteries in one package deliver strong value for extended shooting sessions and backups.\u003c\/li\u003e\n\u003cli\u003eCompatible with a wide list of Panasonic camera models and several charger designations for flexibility.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSome users preferring OEM-branded batteries may be cautious despite safety certifications, which is a reasonable personal preference.\u003c\/li\u003e\n\u003cli\u003ePackaging and documentation vary by seller, so confirm charger compatibility before first use.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Type\u003c\/td\u003e\n\u003ctd\u003eLithium-ion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Voltage\u003c\/td\u003e\n\u003ctd\u003e7.2V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Capacity\u003c\/td\u003e\n\u003ctd\u003e2900mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Quantity\u003c\/td\u003e\n\u003ctd\u003e4-Pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety Standards\u003c\/td\u003e\n\u003ctd\u003eUL1642, CE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuilt-in Protections\u003c\/td\u003e\n\u003ctd\u003eOver-charge, over-discharge, over-voltage, over-current, over-heating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Kastar 4-Pack CGA-DU21 replacement is a pragmatic choice for NV-GS camera owners who need dependable, longer-lasting batteries without repeated purchases. With 2900mAh cells and multiple safety protections it represents good value for shooters who want multiple spares and extended run time at a lower cost than buying single OEM replacements.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill these batteries fit my NV-GS37 camcorder?\u003c\/strong\u003e\u003cbr\u003eYes. The pack lists compatibility with many NV-GS models including NV-GS37 and similar Panasonic camcorders.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre there safety protections built into the batteries?\u003c\/strong\u003e\u003cbr\u003eYes. The batteries include over-charge, over-discharge, over-voltage, over-current and over-heating protection and meet UL1642 and CE standards.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the pack include a charger?\u003c\/strong\u003e\u003cbr\u003eNo. The package includes four batteries; check your existing charger models for compatibility with Panasonic charger designations listed in the product description before use.\u003c\/p\u003e","brand":"Kastar","offers":[{"title":"Default Title","offer_id":48203937251547,"sku":"B09QQN9L39","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71qjPsvJXhL._AC_SL1500.jpg?v=1770311345","url":"https:\/\/gearmusthave.com\/products\/kastar-4-pack-cga-du21-battery-replacement-high-capacity-pack","provider":"GearMustHave","version":"1.0","type":"link"}