850 mAh A battery's capacity is indicated in the unit milliampere-hour (mAh). The higher the amount of mAh, the longer your battery can be used after every charge before it is empty again. So it does not matter if the mAh amount matches your original battery or not.
Type:
Li-ion
Voltage:
3.7V This battery can be used as a replacement for your current battery with a voltage of 3.6V, 3.7V, 3.8V or 3,85V
Dimensions:
51 x 34 x 5 (mm)
12 month warranty
Peter Entwistle rated us:
(4/5)
General:
The order process was good, clear and quick. The goods were dispatched quickly direct from the factory, but took 2 weeks to arrive rather than the 'within a week' suggested (I have now placed two orders and both were about the same time, but I prefer that to getting old stock.
About the product:
The battries seem very good and give a longer time between recharges than the original ones fitted in my Sony MP3 player did when it was new.
Hermes Brandt rated us:
(5/5)
General:
fast service, clear information
About the product:
works perfectly, great price
P Kloos rated us:
(5/5)
Hartmann Zsolt rated us:
(5/5)
General:
Good price, correct deal! Thank's!
About the product:
The battery is work fine, better like the original brand!
Gerhard Tiedtke rated us:
(5/5)
General:
comprehensive product portfolio!
About the product:
product arrived within a couple of days, met specifications and my expectations
Arthur Renckens rated us:
(5/5)
General:
I'm very satisfied.
About the product:
At first look the size of my new battery seems a bit smaller than the original. However, it works! So far, so good!
mohamed mehboob rated us:
(5/5)
General:
good
About the product:
zufrieder
George Fleming rated us:
(5/5)
john mclaughlin rated us:
(5/5)
General:
I was a bit hesitant at first but I placed the order anyway, not sure what to expect. But within two week I had my new battery.
About the product:
I was amazed at how well my sony nw a3000 lasted after first charge (not even a proper charge), and its still going strong!
Jose Lou rated us:
(5/5)
General:
Excellent service, speedy delivery very satisfying transaction. I'll be using BatteryUpgrade.com
About the product:
Very satisfied with the product. Working beautifully.
Roger Kent rated us:
(5/5)
General:
Superb service
Micheal Owens rated us:
(5/5)
General:
You offer a very professional site in which to buy the products.
About the product:
Finding and buying the rare battery that I did (for the Sony PRS-500) was a relief. The battery is working out fine and has given new life to my ebook reader.
Peter Jones rated us:
(5/5)
General:
Excellent, good value, super quick service and delivery. Very good after-sales communications.
About the product:
Did what it said on the box! No problems with fitting. Job done.
Peter Entwistle rated us:
(4/5)
General:
They do what they promise. A slightly longer wait fro the delivery to ensure the 'freshest' stock is worth it
About the product:
Sony battry replacement I purchased seems to run for longer between charges then the original did from new. I have bought two now for two different devices and the avove applies to both of them.
A Schuller rated us:
(5/5)
General:
The service and price were excellent.
About the product:
Perfect match and fit
RC Rand rated us:
(5/5)
General:
Batteryupgrade has a tremendous choice, ordering was easy and I received my products rather fast, after 1 week (from Hong Kong to the Netherlands), in 2envelopes, with real HongKong stamps on in!
About the product:
The Sony NWA-3000 battery gives my Sony mp3player a second life. Playing time is as long as with the original battery. So, I'm very satistied! The Creative Zen F-Xi battery is for my recently bought Creative player, so I will use it after the original battery is exhausted.
Roger Pyecroft rated us:
(5/5)
General:
Very efficient. I was prepared for the slightly longer deivery, so this was no problem
About the product:
Have only just installed. Fitted and chaged fine.
Vincent TILLIETTE rated us:
(5/5)
General:
Fast delivery, good product quality. I am very satisfied with this purchase.
About the product:
Replacement battery does function very well so far.
Harry Hubner rated us:
(5/5)
General:
Very smooth transaction. Completely satisfied.
About the product:
The battery is working fine,so far.
Paul Rooney rated us:
(5/5)
Dave Stammers rated us:
(5/5)
General:
Swift and easy services
About the product:
As advertised, and suitable for my use
A Reid rated us:
(4/5)
General:
I was a little concerned that I had not received the battery and contacted customer services to try to find out when to expect the battery. Customer service were very helpful and polite and put my mind at rest.
About the product:
The battery is working perfectly and I am very pleased to have my MP3 Walkman working again!
robert castle rated us:
(4/5)
General:
ok the items took longer to arrive than expected, but overall speed was reasonable
About the product:
easy to install
Visnja Jovanovic rated us:
(4/5)
Per Eriksson rated us:
(4/5)
General:
Very good that you have so many batterys to chosse from , and the prices are also good!
About the product:
OK
Michael Kelly rated us:
(5/5)
General:
Excellent service.Processed and dispatched my order very quickly.
The 850 mAh 3.7 V battery (Black) comes with 12 months warranty. Besides this, we offer a unique 30-day money back guarantee: in case you are not satisfied with the product, for whatever the reason, you can always return it and get your money back.
Quality and safety
This 850 mAh 3.7 V battery (Black) contains advanced technical components and has been tested according to strict CE safety standards. The 850 mAh 3.7 V battery contains a chip that prevents overcharging and short-circuiting. Next to this, the 850 mAh 3.7 V battery is made from high quality cells that do not suffer from a so-called 'memory effect'.
Factory Fast
The 850 mAh 3.7 V battery is factory fast. Batteries lose performance over their lifetime, even when they are not used. Many importers and resellers store their batteries in stock for a long time before they are sold. BatteryUpgrade.com makes sure that the ordered battery can be shipped directly after production by working together with the manufacturers. So you can be sure that you will get a brand new high quality battery!
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