{"product_id":"kastar-4-pack-bp-21-battery-and-ltd2-usb-charger-replacement-dual","title":"Kastar 4-Pack BP-21 Battery and LTD2 USB Charger Replacement - Dual","description":"\u003cp\u003eIn this review the Kastar 4-Pack BP-21 Battery and LTD2 USB Charger replacement is judged as a practical power solution for photographers using Sigma SD1, SD1 Merrill, SD14 and SD15 cameras. The bottom line: this kit is for shooters who need multiple spare batteries and a portable, flexible charger that can handle two batteries at once. The review finds the combination of four 2400mAh lithium-ion cells and a USB-powered dual charger delivers reliable runtime and convenient charging options for travel or extended shoots.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh capacity batteries:\u003c\/strong\u003e Each 2400mAh lithium-ion cell provides extended shooting time so photographers can spend longer between recharges.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual battery charging:\u003c\/strong\u003e The LTD2 charger can charge two batteries simultaneously, reducing downtime between sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterchangeable plates:\u003c\/strong\u003e The charger plate is changeable so it can accept different compatible battery plates when needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB powered convenience:\u003c\/strong\u003e With Micro-USB and Type-C inputs and a 5V 2-3A input spec, the charger can be powered from power banks or common USB adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntelligent LED display:\u003c\/strong\u003e The LED system indicates charging status and relative battery capacity so users can monitor progress at a glance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePortable kit:\u003c\/strong\u003e The compact batteries and lightweight charger make the pack easy to carry on location or in a camera bag.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is best for DSLR and mirrorless photographers who own compatible Sigma, Pentax, Konica Minolta or Samsung cameras and who need multiple spare batteries for long shoots, travel, or field work. Wedding and event shooters who rotate batteries frequently will appreciate having four cells and the ability to top up two at once.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include photographers who require OEM branded batteries for warranty reasons or extremely high discharge professional video rigs that demand manufacturer-specified battery performance. If you need integrated in-camera charging or single-bay fast charging above the stated 800mA outputs, consider a different charger design.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eProvides four 2400mAh lithium-ion batteries for extended runtime during shoots.\u003c\/li\u003e\n\u003cli\u003eCharger supports simultaneous dual charging, saving time between sessions.\u003c\/li\u003e\n\u003cli\u003eUSB input options and included Micro-USB cable make it easy to charge from power banks or common adapters.\u003c\/li\u003e\n\u003cli\u003eLED indicators give a clear visual of charge progress and battery capacity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCharger output is limited to 8.4V 800mA per bay, which is adequate but not a high-speed professional fast charge.\u003c\/li\u003e\n\u003cli\u003ePackage uses a universal plate system which may require swapping plates for some legacy camera batteries.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\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\u003e7.4V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Capacity\u003c\/td\u003e\n\u003ctd\u003e2400mAh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharger Input\u003c\/td\u003e\n\u003ctd\u003e5V 2-3A (15W)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharger Output\u003c\/td\u003e\n\u003ctd\u003e8.4V 800mA x1 or 800mA x2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharging Options\u003c\/td\u003e\n\u003ctd\u003eMicro-USB input, Type-C input (Micro USB cable included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eSigma BP-21 and listed Konica Minolta, Pentax, Samsung models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Kastar 4-Pack BP-21 Battery and LTD2 USB Charger is a sensible, cost-effective kit for photographers who need multiple spare batteries and flexible USB charging. It delivers reliable capacity, portable dual charging and clear LED status feedback, making it good value for travel and event use, though it is not a specialized high-speed charger for pro video rigs.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these batteries compatible with Sigma BP-21?\u003c\/strong\u003e\u003cbr\u003eYes, the pack is designed to replace Sigma BP-21 and is listed compatible with several Konica Minolta, Pentax and Samsung models as well.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the charger charge two batteries at once?\u003c\/strong\u003e\u003cbr\u003eYes, the LTD2 charger supports charging two batteries simultaneously with an output of 8.4V 800mA per bay.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat cables are included?\u003c\/strong\u003e\u003cbr\u003eThe kit includes a Micro-USB cable and the charger supports both Micro-USB and Type-C input for flexible power sources.\u003c\/p\u003e","brand":"Kastar","offers":[{"title":"Default Title","offer_id":48637516710107,"sku":"B08CT4CWCS","price":37.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81lxD-2agjL._AC_SL1500_7c0851c9-9c24-4a59-8332-f19517b7cba9.jpg?v=1778733073","url":"https:\/\/gearmusthave.com\/products\/kastar-4-pack-bp-21-battery-and-ltd2-usb-charger-replacement-dual","provider":"GearMustHave","version":"1.0","type":"link"}