Microsoft initially refused to acknowledge any issue with the LGC batteries on its Surface Pro 3, forcing some owners to pay $450 for out-of-warranty replacements - but they've since been refunded.
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Microsoft has released new firmware which it says resolves a serious battery issue that prevented some Surface Pro 3 tablets from retaining their charge, and recommends that all SP3 owners install it.
Microsoft acknowledged the latest issue with Surface Pro 3 batteries today, saying that the team is working on a fix, and confirming that the issue was not caused by the latest firmware update.
After Microsoft resolved an issue with Simplo batteries on its Surface Pro 3 last month, users are now reporting problems with LGC batteries, with some unable to use the device unless it's plugged in.