UMC Security Advisory - Celxpert Battery Issues

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Issue date: 30/07/2025 

Updated: 31/07/2025 

Note: We updated with example of LNV-5B10W13897 batteries. (Update: UMC officially designated as L17C3PS2.)

UMC ID: UMC01-07042 

UMC today announced that was issued formal advisory that would recall of current fleet laptops is Lenovo ThinkPad L15 Gen 2a was equipped with Celxpert batteries because that degradation trend was flaw, lasting only 3+ hour battery life as observed. Key findings were included in screenshots.

Figure 1: Battery Details on Vantage.
Figure 1: A degradation trend from 45.73Wh to 38.39Wh in Commercial Vantage.

Multiple complaints from Reddit users raised concerns over the Celxpert batteries because they degrade into 16% wear level based on observations from linux-hardware.org sites that used to lookup for battery models and concluded that Celxpert (e.g, LNV-5B10W13897 (L17C3PS2 detected) batteries) was worst long-term retention of advertised watt-hours. UMC recommends AVOIDING Celxpert-made geninue Lenovo batteries and SWITCH to reliable battery vendors such as Simplo, Sunwoda, or others like Sanyo. UMC, also recommends reaching out to Lenovo representative or locate service center for furthermore details about battery replacements. UMC observed the battery health in Battery Report and Vantage (Commercial Vantage) is actually concern of wear.

Figure 2: A battery shows the healthy battery despite concerns over Celxpert batteries (LNV-5B10W13897).

Figure 3: A capacity shows accelerated battery wear.

We are aware of this concern, UMC will also reconsider the new battery vendor is selected Simplo Technology (Chong Qing). Ltd. for this Lenovo laptop batteries to qualify the selected reliability of fleets. Thank you for cooperation.

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