Some of the PC Advisor laptop reviews indicate that battery life is 2 to 3 hours or more under their standard test conditions. Not sure how this relates to your personal use, but 45 minutes sounds much too little for a new battery.
Hands-on: Acer Predator Triton 700 review
1995-2015: How technology has changed the world in 20 years
D&AD Awards 2017: see the best design, advertising, illustration, animation and VR of the past year
Apple predictions 2017
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.