Apple denied on Thursday that new iPhone 6s smartphones are getting varying battery life results due to different processors as some customer reports indicate.

Some iPhone 6s users are saying that the battery life varies due to different A9 processors inside the devices.  The tech company claims that any difference in battery life is negligible.

"Our testing and customer data show the actual battery life of the iPhone 6S and iPhone 6S Plus, even taking into account variable component differences, vary within just 2 to 3 percent of each other," a company spokesman said in a statement.

Apple used two different chips inside the new iPhones, one from Korea-based company Samsung and one from Taiwan Semiconductor Manufacturing Co. (TSMC), CNet reports.

The company has relied on a single company to create the chips for past iPhone models. This year, supply shortages could have forced Apple to rely on two different companies to provide the A9 chips.

Users that own iPhone 6s models with the TSMC chip say that their battery life is significantly longer than those equipped with the Samsung chip.

A Reddit user performed a battery test with two iPhone 6s models, one with the TSMC chip and one with the Samsung chip. He reported a difference of almost two hours in battery life, with the TSMC chip phone lasting almost eight hours and the Samsung chip phone only lasting about six hours.

The TSMC chip, at 104.5 square mm, is actually larger in size than the Samsung chip at 96 square mm. This should lead to the Samsung chip being more efficient and running cooler, but that does not seem to be the case, Ars Technica reported.

Apple thinks that these intensive battery "benchmark" tests do not represent real world usage of the iPhone and claims the results are inaccurate.

"It's a misleading way to measure real-world battery life," the company said.