{"id":1904,"date":"2026-06-17T09:32:25","date_gmt":"2026-06-17T09:32:25","guid":{"rendered":"https:\/\/www.batteryone.co\/blog\/?p=1904"},"modified":"2026-06-17T09:32:25","modified_gmt":"2026-06-17T09:32:25","slug":"nokia-bl-4ul-battery-guide-compatibility-specs-and-replacement","status":"publish","type":"post","link":"https:\/\/www.batteryone.co\/blog\/archives\/1904","title":{"rendered":"Nokia BL-4UL Battery Guide: Compatibility, Specs, and Replacement"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The&nbsp;<a href=\"https:\/\/www.batteryone.co\/detail\/1742101\/BL-4UL\">Nokia BL-4UL<\/a>&nbsp;is a compact lithium-ion battery designed for various Nokia feature phones as well as the classic revivals released in the 2010s and 2020s. It provides reliable power to these budget-friendly devices, easily handling essential functions like calling and texting.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Specifications<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Capacity:<\/strong>\u00a01200 mAh<\/li>\n\n\n\n<li><strong>Nominal Voltage:<\/strong>\u00a03.7 V<\/li>\n\n\n\n<li><strong>Dimensions:<\/strong>\u00a0Approximately 60.5 mm \u00d7 38 mm \u00d7 4.4 mm<\/li>\n\n\n\n<li><strong>Energy:<\/strong>\u00a0Around 4.44 Wh<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Compatible Models<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The BL-4UL battery fits a wide range of Nokia mobile phones. The primary compatible models include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nokia Asha 225 (Models RM-1011, RM-1012, RM-1126)<\/li>\n\n\n\n<li>Nokia 225 and Nokia 230<\/li>\n\n\n\n<li>Nokia 3310 (2017 version, including TA-1036, RM-1126, 3G, and 4G versions)<\/li>\n\n\n\n<li>Nokia 220 4G<\/li>\n\n\n\n<li>Nokia 5310 (2020)<\/li>\n\n\n\n<li>Nokia 6310 (2021, though this model often uses the BL-4WL battery instead)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Other referenced models include the Nokia Asha 500 and 502. Before purchasing a replacement battery, always verify your exact device model by checking under the battery or in the settings. Please note that this battery is not compatible with the original Nokia 3310 models from the early 2000s or with most smartphones.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Replace the BL-4UL Battery<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Replacing the battery is quick and easy because these devices feature a removable back cover. Follow these steps to complete the replacement:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Power off the phone completely.<\/li>\n\n\n\n<li>Locate the notch on the back cover and gently pry it open using your fingernail or a plastic tool.<\/li>\n\n\n\n<li>Carefully lift the old battery out from its designated slot or edge.<\/li>\n\n\n\n<li>Align the gold contacts of the\u00a0<a href=\"https:\/\/www.batteryone.co\/detail\/1742101\/BL-4UL\">new battery<\/a>\u00a0with the terminals inside the phone, then press it firmly into place.<\/li>\n\n\n\n<li>Snap the back cover back into position until you hear it click.<\/li>\n\n\n\n<li>Charge the phone fully with a compatible charger before turning it on for the first time.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Installing a fresh BL-4UL battery will restore your Nokia phone&#8217;s excellent standby time, allowing it to last for weeks on a single charge. This simple bit of maintenance is a great way to extend the lifespan of these highly reliable feature phones.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The&nbsp;Nokia BL-4UL&nbsp;is a compact lithium-ion battery designed for various Nokia feature phones as well as the classic revivals released in the 2010s and 2020s. It provides reliable power to these budget-friendly devices, easily handling essential functions like calling and texting. Specifications Compatible Models The BL-4UL battery fits a wide range of Nokia mobile phones. The [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[189],"class_list":["post-1904","post","type-post","status-publish","format-standard","hentry","category-batteries","tag-nokia"],"_links":{"self":[{"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/posts\/1904","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/comments?post=1904"}],"version-history":[{"count":1,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/posts\/1904\/revisions"}],"predecessor-version":[{"id":1905,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/posts\/1904\/revisions\/1905"}],"wp:attachment":[{"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/media?parent=1904"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/categories?post=1904"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.batteryone.co\/blog\/wp-json\/wp\/v2\/tags?post=1904"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}