High-end smartphones iPhone 6s Plus and Galaxy Note 5 engage in a battle of the batteries with equal capacities upon testing.

The iPhone collection is not often in front of the pack when it comes to battery life. This didn't make a significant dent on sales though, with the new models iPhone 6s and 6s Plus shattering Apple's own records by selling over 13 million units in the first three days, according to a report from Phone Arena.

It's a plus for iPhone users that battery life this time around is much better, particularly in the iPhone 6s Plus.

According to another report from Phone Arena, the cell capacity of the iPhone 6s Plus is 2,750 mAh, which is close to its predecessor's. However, when it came to testing, the performance of the newer model proved significantly better than the previous iPhone 6 Plus by clocking in an impressive nine hours and 11 minutes.

The results of the test provided further ammunition in the clash of the new iPhone 6s Plus and the latest Galaxy Note 5 since the battery life of both mobile phones are exactly the same upon testing.

The premium phones have been pitted against each other for being the top products in the market and durability tests by warranty provider SquareTrade offered more insights into the constant tug of war between Apple and Samsung.

According to a report from CNET, SquareTrade conducted testing on the iPhone 6s, iPhone 6s Plus and Galaxy Note 5 to see which smartphone is the toughest. The iPhone 6s Plus topped the scores in bendability as it withstood 180 pounds of pressure while both iPhone 6 and Galaxy Note 5 were able to withstand 170 pounds of pressure.

However, all three phones are still vulnerable to the most common accident for mobile users: dropping it face down on the ground. All of the phones tested were damaged and shattered upon impact, with the Galaxy Note 5 emerging as the most vulnerable to this type of hazard. The Samsung smartphone performed best in extreme temperature with the battery lasting almost two hours in zero degrees.

"While Apple touts the iPhone 6s and 6s Plus as the most advanced iPhones ever, we still found them at the mercy of the most common of all problems - the accidental drop on a hard surface," Jessica Hoffman, vice president of global communications for SquareTrade, said in a report by CNET.

She added, "On the flip side, both manufacturers [Apple and Samsung] have responded to bendgate with significant improvements on the three phones we tested. This is great news for consumers."