{"id":3990,"date":"2026-01-27T07:36:26","date_gmt":"2026-01-27T07:36:26","guid":{"rendered":"https:\/\/www.krlpower.com\/?post_type=product&#038;p=3990"},"modified":"2026-04-01T06:47:03","modified_gmt":"2026-04-01T06:47:03","slug":"25-2v-4-9ah-underwater-walkie-talkie-lithium-battery","status":"publish","type":"product","link":"https:\/\/www.krlpower.com\/ar\/battery\/25-2v-4-9ah-underwater-walkie-talkie-lithium-battery\/","title":{"rendered":"25.2V 4.9AH Underwater Walkie-Talkie Lithium Battery"},"content":{"rendered":"<div data-elementor-type=\"product-post\" data-elementor-id=\"3990\" class=\"elementor elementor-3990\" data-elementor-post-type=\"product\">\n\t\t\t\t<div class=\"elementor-element elementor-element-399bae9d e-flex e-con-boxed e-con e-parent\" data-id=\"399bae9d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7bd5819 elementor-widget elementor-widget-heading\" data-id=\"7bd5819\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Technical Specifications of 25.2V 4.9Ah Battery Pack<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f6f12e5 elementor-widget elementor-widget-text-editor\" data-id=\"4f6f12e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Project Number: 42DZ001-04<br \/>Cell model: 21700\/3.6V\/4.9Ah<br \/>Battery specifications: 21700 \u2013 7S1P \/ 25.2V \/ 4.9Ah<br \/>Rated voltage: 25.2V<br \/>Rated capacity: 4.9Ah<br \/>Charging voltage: 29.4V<br \/>Charging current: \u2264 2.45A<br \/>Discharge current: 5A<br \/>Instantaneous discharge current: 6A \u2013 12A<br \/>Discharge cut-off voltage: 19.25V<br \/>Internal resistance of the finished product: \u2264 200 m\u03a9<br \/>Battery weight: 550g<br \/>Product dimensions: 165*76*30mm (Maximum)<br \/>Charging temperature: 0 \u2013 45\u2103<br \/>Discharge temperature: -20 to 60 degrees Celsius<br \/>Storage temperature: -20 to 45 degrees Celsius<br \/>Temperature protection: 65\u2103 \u00b1 5\u2103<br \/>Battery housing: PVC bracket<br \/>Lithium battery protection: short circuit protection, overcharge protection, overdischarge protection, overcurrent protection, temperature protection, battery level meter, SMBUS communication, etc.<br \/>Application fields: Underwater walkie-talkies, underwater equipment<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-35826ca e-flex e-con-boxed e-con e-parent\" data-id=\"35826ca\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-01d7d02 elementor-widget elementor-widget-heading\" data-id=\"01d7d02\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Key Features &amp; Advantages<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-8b97324 e-flex e-con-boxed e-con e-parent\" data-id=\"8b97324\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-176c8e0 elementor-widget elementor-widget-text-editor\" data-id=\"176c8e0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul data-path-to-node=\"20\"><li><p data-path-to-node=\"20,0,0\"><b data-path-to-node=\"20,0,0\" data-index-in-node=\"0\">Excellent Waterproof &amp; Sealing:<\/b> Designed specifically for underwater environments, featuring robust PVC bracket housing to ensure stable operation in high-humidity and subsea conditions.<\/p><\/li><li><p data-path-to-node=\"20,1,0\"><b data-path-to-node=\"20,1,0\" data-index-in-node=\"0\">Advanced Smart BMS Protection:<\/b> Built-in sophisticated Battery Management System (BMS) with short circuit, overcharge, overdischarge, overcurrent, and temperature protection. Features SMBUS communication for precise data transmission and battery health monitoring.<\/p><\/li><li><p data-path-to-node=\"20,2,0\"><b data-path-to-node=\"20,2,0\" data-index-in-node=\"0\">Premium 21700 Li-ion Cells:<\/b> Utilizing high-quality 21700 battery cells (3.6V 4.9Ah) configured in 7S1P, offering higher energy density, lower internal resistance, and a longer lifecycle compared to traditional cells.<\/p><\/li><\/ul><h4 data-path-to-node=\"21\">\u00a0<\/h4>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0d915b9 e-flex e-con-boxed e-con e-parent\" data-id=\"0d915b9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a20d54c elementor-widget elementor-widget-heading\" data-id=\"a20d54c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Applications for Our Custom Waterproof Batteries<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-77c6c65 e-flex e-con-boxed e-con e-parent\" data-id=\"77c6c65\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8969ba8 elementor-widget elementor-widget-text-editor\" data-id=\"8969ba8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Underwater Walkie-Talkies<\/p><p>Marine Instrumentation\u00a0<\/p><p>ROV &amp; Underwater Drones<\/p><p>Subsea Lighting Systems<\/p><p>\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-891bc47 e-flex e-con-boxed e-con e-parent\" data-id=\"891bc47\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-37408b6 elementor-widget elementor-widget-heading\" data-id=\"37408b6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">OEM &amp; ODM Custom Waterproof Battery Solutions<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d3ad1d8 e-flex e-con-boxed e-con e-parent\" data-id=\"d3ad1d8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a4da50c elementor-widget elementor-widget-text-editor\" data-id=\"a4da50c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Can&#8217;t find the exact battery size for your underwater device? KRL Power offers professional customization services. From adjusting the voltage and capacity to redesigning the battery dimensions and changing connector types, our engineering team will work closely with you to design the perfect power solution for your project.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-cee4f0e e-con-full e-flex e-con e-child\" data-id=\"cee4f0e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-98d1a31 elementor-widget elementor-widget-heading\" data-id=\"98d1a31\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Frequently Asked Questions (FAQ)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6124fae elementor-widget elementor-widget-n-accordion\" data-id=\"6124fae\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;default_state&quot;:&quot;all_collapsed&quot;,&quot;max_items_expended&quot;:&quot;one&quot;,&quot;n_accordion_animation_duration&quot;:{&quot;unit&quot;:&quot;ms&quot;,&quot;size&quot;:400,&quot;sizes&quot;:[]}}\" data-widget_type=\"nested-accordion.default\">\n\t\t\t\t\t\t\t<div class=\"e-n-accordion\" aria-label=\"\u0627\u0644\u0623\u0643\u0648\u0631\u062f\u064a\u0648\u0646. \u0627\u0641\u062a\u062d \u0627\u0644\u0631\u0648\u0627\u0628\u0637 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0645\u0641\u062a\u0627\u062d \u00abEnter\u00bb \u0623\u0648 \u0645\u0641\u062a\u0627\u062d \u0627\u0644\u0645\u0633\u0627\u0641\u0629\u060c \u0648\u0623\u063a\u0644\u0642\u0647\u0627 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0645\u0641\u062a\u0627\u062d \u00abEscape\u00bb\u060c \u0648\u062a\u0646\u0642\u0644 \u0628\u064a\u0646\u0647\u0627 \u0628\u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0645\u0641\u0627\u062a\u064a\u062d \u0627\u0644\u0623\u0633\u0647\u0645\">\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1010\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"1\" tabindex=\"0\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1010\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Can the dimensions of this 25.2V battery pack be customized? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1010\" class=\"elementor-element elementor-element-a82c01b e-con-full e-flex e-con e-child\" data-id=\"a82c01b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0c58dfc elementor-widget elementor-widget-text-editor\" data-id=\"0c58dfc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Yes, as a leading battery manufacturer, KRL can customize the shape and dimensions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1011\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"2\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1011\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> What is the operating temperature for this underwater battery? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1011\" class=\"elementor-element elementor-element-c048328 e-con-full e-flex e-con e-child\" data-id=\"c048328\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3d80d6e elementor-widget elementor-widget-text-editor\" data-id=\"3d80d6e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>It supports a discharge temperature of -20\u00b0C to 60\u00b0C.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t\t<details id=\"e-n-accordion-item-1012\" class=\"e-n-accordion-item\" >\n\t\t\t\t<summary class=\"e-n-accordion-item-title\" data-accordion-index=\"3\" tabindex=\"-1\" aria-expanded=\"false\" aria-controls=\"e-n-accordion-item-1012\" >\n\t\t\t\t\t<span class='e-n-accordion-item-title-header'><div class=\"e-n-accordion-item-title-text\"> Do you provide samples for testing? <\/div><\/span>\n\t\t\t\t\t\t\t<span class='e-n-accordion-item-title-icon'>\n\t\t\t<span class='e-opened' ><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-minus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h384c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t\t<span class='e-closed'><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-plus\" viewbox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M416 208H272V64c0-17.67-14.33-32-32-32h-32c-17.67 0-32 14.33-32 32v144H32c-17.67 0-32 14.33-32 32v32c0 17.67 14.33 32 32 32h144v144c0 17.67 14.33 32 32 32h32c17.67 0 32-14.33 32-32V304h144c17.67 0 32-14.33 32-32v-32c0-17.67-14.33-32-32-32z\"><\/path><\/svg><\/span>\n\t\t<\/span>\n\n\t\t\t\t\t\t<\/summary>\n\t\t\t\t<div role=\"region\" aria-labelledby=\"e-n-accordion-item-1012\" class=\"elementor-element elementor-element-f171cc2 e-con-full e-flex e-con e-child\" data-id=\"f171cc2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-61c7cab elementor-widget elementor-widget-text-editor\" data-id=\"61c7cab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Yes, we welcome sample orders for your engineering testing before mass production.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/details>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Suitable for underwater walkie-talkies and underwater equipment<\/p>\n<p>Product Number: 42DZ001-04<br \/>\nRated voltage: 25.2V<br \/>\nRated capacity: 4900mAh<br \/>\nBattery size: 165*76*30mm<br \/>\nCharging temperature: 0 \u2013 45\u2103<br \/>\nDischarge temperature: -20 to 60 degrees Celsius<br \/>\nApplication field: Instrumentation and meters<\/p>","protected":false},"featured_media":6924,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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