Warning: is_file(): open_basedir restriction in effect. File(/usr/www/users/engagcgssa//index.php/wp-json/wp/v2/product/11628) is not within the allowed path(s): (/usr/www/wwws/users/engagcgssa:/usr/wwws/users/engagcgssa:/usr/www/users/engagcgssa:/usr/home/engagcgssa:/usr/local/rmagic:/usr/share/php:/usr/local/lib/php:/tmp:/usr/bin:/usr/local/bin:/usr/local/share/www:/usr/www/share/www:/usr/share/misc:/dev/urandom:/var/www/php_profiler/xhgui) in /usr/www/users/engagcgssa/wp-content/plugins/jetpack-boost/app/modules/optimizations/page-cache/pre-wordpress/class-boost-cache-utils.php on line 80 Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/engagcgssa/wp-content/plugins/jetpack-boost/app/modules/optimizations/page-cache/pre-wordpress/class-boost-cache-utils.php:80) in /usr/www/users/engagcgssa/wp-includes/rest-api/class-wp-rest-server.php on line 1909 Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/engagcgssa/wp-content/plugins/jetpack-boost/app/modules/optimizations/page-cache/pre-wordpress/class-boost-cache-utils.php:80) in /usr/www/users/engagcgssa/wp-includes/rest-api/class-wp-rest-server.php on line 1909 Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/engagcgssa/wp-content/plugins/jetpack-boost/app/modules/optimizations/page-cache/pre-wordpress/class-boost-cache-utils.php:80) in /usr/www/users/engagcgssa/wp-includes/rest-api/class-wp-rest-server.php on line 1909 Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/engagcgssa/wp-content/plugins/jetpack-boost/app/modules/optimizations/page-cache/pre-wordpress/class-boost-cache-utils.php:80) in /usr/www/users/engagcgssa/wp-includes/rest-api/class-wp-rest-server.php on line 1909 Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/engagcgssa/wp-content/plugins/jetpack-boost/app/modules/optimizations/page-cache/pre-wordpress/class-boost-cache-utils.php:80) in /usr/www/users/engagcgssa/wp-includes/rest-api/class-wp-rest-server.php on line 1909 Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/engagcgssa/wp-content/plugins/jetpack-boost/app/modules/optimizations/page-cache/pre-wordpress/class-boost-cache-utils.php:80) in /usr/www/users/engagcgssa/wp-includes/rest-api/class-wp-rest-server.php on line 1909 Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/engagcgssa/wp-content/plugins/jetpack-boost/app/modules/optimizations/page-cache/pre-wordpress/class-boost-cache-utils.php:80) in /usr/www/users/engagcgssa/wp-includes/rest-api/class-wp-rest-server.php on line 1909 Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/engagcgssa/wp-content/plugins/jetpack-boost/app/modules/optimizations/page-cache/pre-wordpress/class-boost-cache-utils.php:80) in /usr/www/users/engagcgssa/wp-includes/rest-api/class-wp-rest-server.php on line 1909 {"id":11628,"date":"2026-03-10T17:54:46","date_gmt":"2026-03-10T15:54:46","guid":{"rendered":"https:\/\/engageoptics.co.za\/?post_type=product&p=11628"},"modified":"2026-09-08T14:47:06","modified_gmt":"2026-09-08T12:47:06","slug":"icr-21700-3-7v-rechargeable-li-ion-battery-4800-mah-high-drain-cell","status":"publish","type":"product","link":"https:\/\/engageoptics.co.za\/index.php\/product\/icr-21700-3-7v-rechargeable-li-ion-battery-4800-mah-high-drain-cell\/","title":{"rendered":"ICR 21700 3.7V Rechargeable Li-ion Battery \u2013 4800 mah \u2013 High-Drain Cell"},"content":{"rendered":"
Power your high-performance devices with the ICR 21700 Lithium-Ion Battery<\/b>. Engineered for longevity and consistent power delivery, the 21700 format offers a significant energy density upgrade over the standard 18650 cells.<\/span> Whether you are building a custom battery pack or upgrading your tactical gear, this cell provides the reliability you need.<\/p>\n Overview Power your high-performance devices with the ICR 21700 Lithium-Ion Battery. Engineered for longevity and consistent power delivery, the 21700 format offers a significant energy density upgrade over the standard 18650 cells. Whether you are building a custom battery pack or upgrading your tactical gear, this cell provides the reliability you need. Key Technical Specifications…<\/p>\nKey Technical Specifications<\/b><\/h3>\n
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\n Feature<\/strong><\/td>\n Specification<\/strong><\/td>\n<\/tr>\n<\/thead>\n\n \n Chemistry<\/b><\/span><\/td>\n Lithium Cobalt Oxide (ICR)<\/span><\/td>\n<\/tr>\n \n Nominal Voltage<\/b><\/span><\/td>\n 3.7V<\/span><\/td>\n<\/tr>\n \n Max Charge Voltage<\/b><\/span><\/td>\n 4.2V<\/span><\/td>\n<\/tr>\n \n Form Factor<\/b><\/span><\/td>\n 21700 (21mm diameter x 70mm length)<\/span><\/td>\n<\/tr>\n \n Terminal Type<\/b><\/span><\/td>\n Flat Top (Standard)<\/span><\/td>\n<\/tr>\n \n Cycle Life<\/b><\/span><\/td>\n 500+ Cycles<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"