{"id":35474,"date":"2025-04-13T02:59:57","date_gmt":"2025-04-13T00:59:57","guid":{"rendered":"https:\/\/pro-lithium.com\/problems-and-solutions-for-unused-lithium-batteries\/"},"modified":"2025-08-21T06:05:11","modified_gmt":"2025-08-21T04:05:11","slug":"problems-and-solutions-for-unused-lithium-batteries","status":"publish","type":"page","link":"https:\/\/pro-lithium.com\/en\/problems-and-solutions-for-unused-lithium-batteries\/","title":{"rendered":"Problems and Solutions for Unused Lithium Batteries"},"content":{"rendered":"<div class=\"wpb-content-wrapper\" id=\"wpb-content-root\"><p>[vc_row][vc_column][vc_custom_heading text=&#8221;Problems and Solutions for Unused Lithium Batteries&#8221; font_container=&#8221;tag:h2|text_align:center&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_single_image image=&#8221;39849&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221;][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;39853&#8243; img_size=&#8221;medium&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221;][\/vc_column][vc_column width=&#8221;3\/4&#8243;][vc_column_text css=&#8221;&#8221;]The approach of warmer weather and the resumption of electric mobility activities often highlight a common problem: lithium batteries that have not been used for an extended period, such as after a vacation, may no longer charge. Faced with this situation, the first reaction is often to conclude that the battery is defective. However, before drawing this conclusion, it is important to follow a methodical approach to identify the cause of the problem and attempt to resolve it.  <\/p>\n<p>We&#8217;ll walk you through the possible symptoms and possible solutions for these stubborn batteries.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;39867&#8243; img_size=&#8221;medium&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221;][\/vc_column][vc_column width=&#8221;3\/4&#8243;][vc_custom_heading text=&#8221;First Essential Checks (Before Opening)&#8221; font_container=&#8221;tag:h2|text_align:center&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_column_text css=&#8221;&#8221;]Before any internal manipulation, the first crucial step is to carefully examine the external condition of the battery:<\/p>\n<ul>\n<li><strong>Connector: <\/strong>Check for corrosion, deformation or signs of overheating (melted plastic, blackened areas).<\/li>\n<li><strong>Odor:<\/strong> Be alert for any suspicious odors, especially a strong smell of hot plastic or chemicals.<\/li>\n<\/ul>\n<p><strong>Safety First<\/strong>: If you detect an abnormal odor or signs of overheating at the connector, <strong>do not attempt to charge or open the battery.<\/strong> Immediately isolate it in a safe place, outdoors and away from any flammable materials, due to the potential fire hazard.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;39871&#8243; img_size=&#8221;medium&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221;][\/vc_column][vc_column width=&#8221;3\/4&#8243;][vc_custom_heading text=&#8221;Internal Diagnostics (If Battery Appears Normal)&#8221; font_container=&#8221;tag:h2|text_align:center&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_column_text css=&#8221;&#8221;]If the external inspection does not reveal any abnormalities, you can proceed to carefully open the battery case.<\/p>\n<ol>\n<li><strong>Accessing the Cells and BMS:<\/strong> Generally, to access the cells and the battery management system (BMS), it is necessary to remove a first protective plastic film (often blue) and an insulating sheet (often yellow) using a cutter. <strong>Be extremely careful during this step to avoid damaging the cells with the blade.<\/strong><\/li>\n<li><strong>Voltage Measurement<\/strong>: Once the BMS is accessible, the first measurement to be made is the overall battery voltage. Use a multimeter to measure the voltage between the negative output pole of the BMS and the positive output pole. <\/li>\n<li><strong>Voltage Interpretation:<\/strong> If the measured voltage is significantly lower than the nominal voltage indicated on the battery, this confirms a deep discharge due to prolonged non-use.<\/li>\n<\/ol>\n<p>[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;39885&#8243; img_size=&#8221;medium&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221;][\/vc_column][vc_column width=&#8221;3\/4&#8243;][vc_custom_heading text=&#8221;Attempt at Reactivation (Professional Charge)&#8221; font_container=&#8221;tag:h2|text_align:center&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_column_text css=&#8221;&#8221;]In the case of a deep discharge, using a standard charger supplied with the device may not be enough to restart the battery. It is then recommended to use a professional charger capable of delivering a low current for a gradual reset. <\/p>\n<ol>\n<li><strong>Professional Charger <\/strong>Connection: Connect the positive pole of the charger to the positive input of the BMS and the negative pole of the charger to the negative input of the BMS.<\/li>\n<li><strong>Careful and Supervised Charging:<\/strong> Charging must be carried out with great caution and under constant supervision. Stay near the battery for the entire duration of the initial charge. Set the charger to a voltage corresponding to the nominal voltage of the battery.  <\/li>\n<li><strong>Warning Signs: <\/strong>Be extremely vigilant for any abnormal signs during charging:\n<ul>\n<li><strong>Suspicious smell<\/strong><\/li>\n<li><strong>Excessive battery heating<\/strong><\/li>\n<li><strong>Smoke emission<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>If any of these signs appear, immediately <strong>stop charging and isolate the battery outdoors,<\/strong> away from any fire hazard.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;39919&#8243; img_size=&#8221;medium&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221;][\/vc_column][vc_column width=&#8221;3\/4&#8243;][vc_custom_heading text=&#8221;End of Charge and Reassembly&#8221; font_container=&#8221;tag:h2|text_align:center&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_column_text css=&#8221;&#8221;]If charging is normal and the battery reaches full charge, you can proceed with reassembly:<\/p>\n<ol>\n<li><strong>Reassembly:<\/strong> Replace the insulating sheet and the protective plastic film.<\/li>\n<li><strong>Test with the Standard Charger: <\/strong>Then reconnect the battery to its original charger to verify that it is charging correctly.<\/li>\n<\/ol>\n<p>By following these steps carefully and always prioritizing safety, you can diagnose and potentially resolve problems with unused lithium batteries.[\/vc_column_text][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>[vc_row][vc_column][vc_custom_heading text=&#8221;Problems and Solutions for Unused Lithium Batteries&#8221; font_container=&#8221;tag:h2|text_align:center&#8221; use_theme_fonts=&#8221;yes&#8221; css=&#8221;&#8221;][vc_single_image image=&#8221;39849&#8243; img_size=&#8221;full&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221;][\/vc_column][\/vc_row][vc_row][vc_column width=&#8221;1\/4&#8243;][vc_single_image image=&#8221;39853&#8243; img_size=&#8221;medium&#8221; alignment=&#8221;center&#8221; css=&#8221;&#8221;][\/vc_column][vc_column width=&#8221;3\/4&#8243;][vc_column_text css=&#8221;&#8221;]The approach of warmer weather and the resumption of electric mobility activities often highlight a common problem: lithium batteries that have not been used for an extended period, such as after a vacation, may [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"rs_blank_template":"","rs_page_bg_color":"","slide_template_v7":"","site-sidebar-layout":"no-sidebar","site-content-layout":"plain-container","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":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","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-4)","background-image":"","background-repeat":"repeat","background-position":"center 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