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  • Eton BoostBloc 4000mAh Portable Backup Battery Pack-Charger for Smart Phones (two full charges for most phones) and Other Devices (NBOBL4000B)
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Eton BoostBloc 4000mAh Portable Backup Battery Pack-Charger for Smart Phones (two full charges for most phones) and Other Devices (NBOBL4000B)

by Eton

List Price: $79.99
Price: $22.83 & FREE Shipping
You Save: $57.16 (71%)
In stock.
Usually ships within 2 to 3 days.
Ships from and sold by Limited Goods.
Black
BoostBloc 4000
  • Backup battery pack with rechargeable 4000nAh lithium ion polymer battery
  • Fully charges most smartphones two times when fully charged
  • USB output to charge smartphone
  • LED battery charge indicator and shake unit to check battery level
  • Micro-USB DC input for use with smart phone chargers (iPhone block, etc.)
See more product details
41 new from $17.83 3 used from $15.39

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Product Information

Color: Black | Style: BoostBloc 4000
Technical Details
Brand NameEton
Item Weight1.6 ounces
Product Dimensions1 x 2.2 x 2.2 inches
Item model numberNBOBL4000B
Batteries:1 Lithium ion batteries required. (included)
Power Source TypeBattery
Number of Items1
Item Display dimensions L x W x H5 x 5 x 5 inches
  
Additional Information
ASINB009OYSPDW
Best Sellers Rank #129,356 in Cell Phones & Accessories (See top 100)
Shipping Weight9.6 ounces (View shipping rates and policies)
ShippingThis item is also available for shipping to select countries outside the U.S.
Date First AvailableOctober 11, 2012
  
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Product Description

Color: Black | Style: BoostBloc 4000

Product Description

BoostTurbine4000

Rechargeable USB Portable Backup Battery Pack

Main
Turbine
A portable power Boost wherever you go

Get a power boost! BoostTurbine4000 from Etón is a durable back-up battery with a hand turbine power generator that provides power when you need it most. For everyday or emergency use, BoostTurbine4000 enables you to charge your mobile device anytime, anywhere.

Fast and Efficient

Fast and efficient, in one minute the hand turbine power generator can produce enough power for about 4 minutes of talk time and a few critical texts. When fully charged, BoostTurbine4000 fully charges most smartphones twice.

BoostTurbine4000 is made of tough but lightweight aluminum and with its sleek and elegant design it's compact enough to fit in your pocket. BoostTurbine4000 features a Micro-USB DC input to use with most smartphone chargers and a high output (2.1A) USB port for charging most mobile devices, including tablets. Press button to see LED indicator of battery charge level. BoostTurbine4000 is completely self-contained and it's all you need for an on-the-go-power solution.

Charging
Compatible
Features
  • Backup Battery pack with rechargeable 4000mAh lithium ion battery
  • Hand turbine power generator
  • Fully charges most smartphones two times when fully charged
  • Lightweight and durable aluminum body
  • USB output to charge smartphone or tablet
  • LED battery charge indicator
  • Micro-USB DC input for use with smart phone chargers (iPhone block, etc.)
Eton Logo Boost 2000 Boost 4000 Boost 4200 Boost 8400
Features Boost Turbine 2000 Boost Turbine 4000 Boost Turbine 4200 Boost Turbine 8400
Battery Capacity 2000 mAh 4000 mAh 4200 mAh Lithium
Battery Type Lithium Lithium Lithium Lithium
Charges Tablets No Yes Yes Yes
Emergency Crank Power Yes Yes No No
Dual USB Output No No No No
Size (in) 5 x 2.2 x 1 5 x 2.2 x 1 5.1 x 2.5 x 1.1 5.1 x 2.7 x 0.6
Weight 7.0 oz 9.0 oz 5.0 oz 7.5 oz

From the Manufacturer

BoostTurbine4000

Rechargeable USB Portable Backup Battery Pack

Main
Turbine
A portable power Boost wherever you go

Get a power boost! BoostTurbine4000 from Etón is a durable back-up battery with a hand turbine power generator that provides power when you need it most. For everyday or emergency use, BoostTurbine4000 enables you to charge your mobile device anytime, anywhere.

Fast and Efficient

Fast and efficient, in one minute the hand turbine power generator can produce enough power for about 4 minutes of talk time and a few critical texts. When fully charged, BoostTurbine4000 fully charges most smartphones twice.

BoostTurbine4000 is made of tough but lightweight aluminum and with its sleek and elegant design it's compact enough to fit in your pocket. BoostTurbine4000 features a Micro-USB DC input to use with most smartphone chargers and a high output (2.1A) USB port for charging most mobile devices, including tablets. Press button to see LED indicator of battery charge level. BoostTurbine4000 is completely self-contained and it's all you need for an on-the-go-power solution.

Charging
Compatible
Features
  • Backup Battery pack with rechargeable 4000mAh lithium ion battery
  • Hand turbine power generator
  • Fully charges most smartphones two times when fully charged
  • Lightweight and durable aluminum body
  • USB output to charge smartphone or tablet
  • LED battery charge indicator
  • Micro-USB DC input for use with smart phone chargers (iPhone block, etc.)
Eton Logo Boost 2000 Boost 4000 Boost 4200 Boost 8400
Features Boost Turbine 2000 Boost Turbine 4000 Boost Turbine 4200 Boost Turbine 8400
Battery Capacity 2000 mAh 4000 mAh 4200 mAh Lithium
Battery Type Lithium Lithium Lithium Lithium
Charges Tablets No Yes Yes Yes
Emergency Crank Power Yes Yes No No
Dual USB Output No No No No
Size (in) 5 x 2.2 x 1 5 x 2.2 x 1 5.1 x 2.5 x 1.1 5.1 x 2.7 x 0.6
Weight 7.0 oz 9.0 oz 5.0 oz 7.5 oz

Customer Reviews

Handy when camping, driving, etc.
Lindsey Torgerson
No matter what you do, but this device would just not charge my blackberry 9900 defeating the whole purpose carrying it in my bag.
Anurag Srivastava
It's been very reliable and holds it's charge well when not using it for long periods of time.
JayBird

Most Helpful Customer Reviews

19 of 20 people found the following review helpful By John Williamson TOP 100 REVIEWERVINE VOICE on May 12, 2013
Style Name: BoostBloc 4000Color Name: Black Verified Purchase
Hurricane Sandy hit the New York area in the fall of 2012, effecting over 200,000 of us who got caught up in the fury of the deadliest and most destructive hurricane of the 2012 Atlantic hurricane season. With power out for much of us in Lower Manhattan for days, it became time to take a a more serious look at emergency preparedness. Luckily I was well-prepared for the five-day power outages we went through, but one can never be prepared enough.

Etón BoostBloc 4000 is a small, compact device that is designed to serve as a portable backup battery pack and charger for smartphones and other USB-powered devices. It's deceptively compact, more than one might guess from the images here. At a total of 4000mAh, it's listed as offering "two full charges for most phones," but more on this later.

I'll list the subjective pros and cons found so far with this portable backup battery pack/charger for those looking for just the key points, then follow with some expanded details.

◆ High Points:

+ Compact; fits easily in your hand, 1.0"H x 2.2"W x 2.2"D, weighs ~3¾ ounces
+ Clean, minimalist design; fits into any work or professional environment
+ Micro-USB DC input; allow for connection to most USB chargers
+ LED charge indicators; four levels, activated by a shake
+ Micro-USB cable included; about 2-feet long

◆ Low Points:

- May or may not live up to "two full charges" claim. See below.

◆ In Use:

The Etón BoostBloc 4000 comes packaged in a clear presentation box that's easy to open, and (luckily for us) not one of those clamshell packages.
Read more ›
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8 of 8 people found the following review helpful By punypretzels on July 8, 2013
Style Name: BoostBloc 4000Color Name: Red
I love my little BoostBloc, it's small enough to carry around in my bag everywhere I go. I can usually get a few charges out of it. Though I usually don't charge my phone all the way back up, just enough of a boost to get me through the rest of a long day. The bloc itself charges FAST, I plug it in and 30 minutes later all the little charge level lights are on indicating a full charge.

I will note that I do not think they are worth paying the full price for. Shop around, I got mine for MUCH cheaper than amazon lists them at.
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10 of 12 people found the following review helpful By JayBird on May 10, 2013
Style Name: BoostBloc 6600Color Name: White Verified Purchase
I own a couple of different battery packs as I have a smartphone that loves to each it's charge up when I'm hiking/biking and away from an outlet. I own a couple other Eton products and decided I would try this block from them. I'm glad I did. I can throw this in my pack when out and about and keep my phone charged wherever I go. It's been very reliable and holds it's charge well when not using it for long periods of time. I've also charged my phone up to three times from 25% to 100% on a single charge. It's also one of the few external chargers like this that will charge my Kindle Fire HD 8.9. Very helpful if I'm out camping and I want to watch a movie that I've downloaded to the Kindle. I've had this for almost a year now and it stays in my backpack ready when I need it. I lost my first one somewhere and couldn't live without it so I bought a second one almost immediately. Worth the investment for me and has paid for itself several times by providing power in situations where I needed it.
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2 of 2 people found the following review helpful By Gregg on July 31, 2014
Style Name: BoostBloc 6600Color Name: Red Verified Purchase
Purchased this for a trip to Disney world to keep the phones/ go pro camera charged for a full 7am to 11pm day at the park. Worked great. Had enough charge to power up an IPhone 5s and a SGS2 with power left over. The go pro did not use a much battery as I thought it would. I have used it on other trips and same results. The blue lights indicating the amount of charge are great just give the block a shake. NOTE. Be sure to pack your charging cables specific to your phone or device; this only has a cord for you to charge the block.
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1 of 1 people found the following review helpful By Anurag Srivastava on December 2, 2013
Style Name: BoostBloc 6600Color Name: White Verified Purchase
No matter what you do, but this device would just not charge my blackberry 9900 defeating the whole purpose carrying it in my bag. It seems to work OK with other devices.
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1 of 1 people found the following review helpful By Useful on June 16, 2013
Style Name: BoostBloc 6600Color Name: White Verified Purchase
First I have to say its look like an apple product that is attractive it self second its useful for people spend their time outdoor third they used high quality material to made it all I have to say I like it so much
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1 of 1 people found the following review helpful By T. Benecke on May 21, 2013
Style Name: BoostBloc 6600Color Name: Red Verified Purchase
Fabulous charger! It actually works as advertised. This is great for emergency preparedness - you never know when the lights will go out! I also like it for camping and other activities where power isn't readily available. It's very compact and easy to use. And who can resist red?!?
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The manufacturer commented on the review below
By Darlene on August 5, 2014
Style Name: BoostBloc 6600Color Name: Red Verified Purchase
This does not work. I got stuck on a plane for 4.5 hours on the runway and it didn't work for my iphone or I pad. My husband tried it with his kindle fire and Samsung note-nothing--as is DOES NOT WORK at all. I just looked up the return policy and since we didn't try to use this in a real life circumstance within 30 days, we can't return it?? So we're out $80. Very disappointed. I bought off from a recommendation off Samantha Brown of Travel Channel fame's website-I hope hers worked. Great idea-wish I could exchange it.
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The manufacturer commented on this review(What's this?)
September 10, 2014
Hi Darlene. We apologize for your experience with your BoostBloc 6600. We received your e-mail to customer service and will follow up with you shortly.