Lenovo IdeaPad U430 Touchbattery lasts 5:29 hours on Our WLAN test is more realistic with a luminance of 150 cd/m² (center) while webpages are refreshed via script

Lenovo IdeaPad U430 Touch Battery runtimes are a strong suit ,the 14-inch notebook manages almost 12 hours during idle. However, this is a very unrealistic scenario (minimum brightness, energy saving profile).

Lenovo IdeaPad U430 Touchbattery lasts 5:29 hours  on Our WLAN test is more realistic with a luminance of 150 cd/m² (center) while webpages are refreshed via script.

the competitors cannot keep up with that: Aspire E1 572G (4:26 h, 37 Wh) and VivoBook S551LB (4:51 h, 50 Wh). Our review unit does benefit from a slightly larger battery (Lenovo IdeaPad U430 Touch Battery )with 52 Wh. The predecessor U410 Touch only lasted 3:48 hours in the same scenario (probably lower capacity).

Acer Aspire P3-171-6820 4-cell lithium-ion battery provided over five hours of unplugged computing power

The Acer Aspire P3-171-6820 4-cell lithium-ion battery lasted 5 hours 11 minutes on our battery rundown test. That's right up there with the Samsung ATIV Smart PC Pro (5:12) and a bit longer than the Dell XPS 12 (5:09), the Lenovo IdeaPad Yoga 13 (5:00), and Microsoft Surface Pro (4:58). The Asus TX300C held onto its lead with a battery time of 7:35, but it needed two batteries to do so. Without the help of the secondary keyboard case battery, the Transformer Book lasted 4:47.

Acer Aspire P3-171-6820  battery provided over five hours of unplugged computing power;
High quality ACER Aspire P3-171 4-cell laptop batteries
Voltage: 7.6V
Capacity: 5280mAh (40Wh)
Chemical: Li-polymer
Color: black
Property: new original batteries

Warranty: 9 months

ACER Batteries

2ICP5/60/80-2

AC13A3L

Aspire P3-131

Aspire P3-171

KT.00403.013

TravelMate X313

TravelMate X313-E

TravelMate X313-M

Dell Inspiron 14R-5437 swap in a 65WHr battery easily which lasts a phenomenal 9 hours 46 minutes on our battery rundown test

If you decide to keep the laptop for more than the five to seven years many people take to replace their Dell Inspiron 14R-5437 (MR90Y)battery ;you'll be able to swap in a new battery easily once this one has given up the ghost.

The Inspiron 14R-5437 plus the 65WHr battery means that the system lasts a phenomenal 9 hours 46 minutes on our battery rundown test. And we have purchased a new genuine Inspiron 14R-5437  battery after the old one used for two years to take the test;the newly bought Inspiron 14R-5437  battery is definitely achieve the best performance compete with the original one.This means that you should be able to use the system all day and into the night with a single charge. 

If you're a college student or coffee shop habitué, then this is a system you should put on your short list. While the rest of the system's benchmark tests can be described as adequate, the battery life is really the Inspiron 14R-5437's strong point. The IdeaPad U430 Touch is the closest competitor, with almost eight hours of battery life. The others just don't come close. The IdeaPad Z400 Touch stops short of five hours on the same test.

Ins14RD-2628

Ins14RD-2628

Ins14VD-2308

Ins14VD-2308

INSPIRON 14 3421

INSPIRON 14 3421

Inspiron 14 7000

INSPIRON 14R 5421

INSPIRON 14R 5421

Inspiron 14RD 4528T

Inspiron 14V

INSPIRON 15 3521

INSPIRON 15 3521

Inspiron 15 3542-2293

Inspiron 15-3521

Inspiron 15R - 5521

INSPIRON 15R 5521

INSPIRON 15R 5521

Inspiron 15R-5537

Inspiron 15R-5537

INSPIRON 17 3721

INSPIRON 17 3721

INSPIRON 17R 5721

INSPIRON 17R 5721

Inspiron 3521 Series

INSPIRON M531R-5535

Inspiron N3521 Series

HP Envy 17t-j100 - Battery life Up to 3.75 hours with 9-Cell 93WHr Li-Ion Battery, plus up to 2.5 hours with extra 6-Cell 62WHr Li-Ion Battery

HP Envy 17t-j100 - Battery life Up to 3.75 hours with 9-Cell 93WHr Li-Ion Battery, plus up to 2.5 hours with extra 6-Cell 62WHr Li-Ion Battery

HSTNN-LB4O laptop battery store, HP 10.8V 62Wh batteries for canada

High quality HP HSTNN-LB4O 6-cell laptop batteries

• Voltage: 10.8V
• Capacity: 5800mAh (62Wh)
• Chemical: Li-ion
• Color: black
• Property: new original batteries
• Warranty: 9 months

HP Envy 17t-j100 17.3" reinserted the battery, connected the power cord,HP Assistant updated BIOS;

After reading various posts, I solved the problem.  I disconnected the power and removed the HP Envy 17t-j100battery.  
Tag#  Envy 17 Series   Pavilion 15 Series Envy 15 Series Envy 14 Series
Pavilion 14 Series  Pavilion 17 Series

battery part number# 3INR19/65-2   709988-421    710416-001 
710417-001    HSTNN-LB40     HSTNN-LB4N
HSTNN-LB4O    HSTNN-YB40     HSTNN-YB4N
HSTNN-YB4O     P106   P1O6  PI06   PI06XL 
PI09  PIO6   TPN-Q117 TPN-Q119  TPN-Q120
TPN-Q121   TPN-Q122

I then reinserted the  HP Envy 17t-j100 battery, connected the power cord, and pressed the power button.  The BIOS update "recovered," continued, and the system finally booted up.  I was able to enter my password and the system is working normally now.  I'm by no means a computer expert, so this experience was really frightening.  I hope my solution helps someone else. 

You should have your Windows Updates set to Notify as well as Bios Updates Notify; You can prevent more surprises by setting the HP Assistant to Notify in Settings; When HPSA is set to Notify, you still receive notifications of Updates.  You decide when it is a good time to download and install those updates. Your computer's Support Pages -- LOTS of good information here:  manuals, drivers (there will be more than you need - compare against what you see in Control Panel > icon view > Device Manager), Troubleshooting...

all sorts of "stuff".

You need to select your exact model and there you go!

HP Envy 17t Series laptop battery store, HP 62Wh batteries for canada

High quality HP Envy 17 Series 6-cell laptop batteries

• Voltage: 10.8V
• Capacity: 5800mAh (62Wh)
• Chemical: Li-ion
• Color: black
• Property: new original batteries
• Warranty: 9 months