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Tt Tautlih

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Posts posted by Tt Tautlih

  1. Hi 




    I have done alot of searching since mon  14th of juli 2014. All  dutch webstores failed to get the black version.  i found a supplier on thursday that is responsible for selling  the black model to dutch companies, I forward the message to all Dutch webstores who failed my request before.   Finally 1 single webshop emailed me on Friday , the black version is available, delivery time is    2- 3 weeksss :-(  The price include shipping is much better 40 euro incl shipping instead of 50 euro but i think is still expensive




    I going to place an order next week (black model LH0014 - A). If you have a better quiker solution.

    Plz let me know.

    I would like to know, How much it cost me include shipping    and how long the delivery will take.
    i dont want to spent to much time on 1 item.  I use paypal for goods outside Holland. I do not have master/credit card,amazon


    Best regards


    I'll have an update for you by Wednesday at the latest!

  2. What is a Portable Battery Pack?

    Portable battery packs are a form of mobile power supply that provides convenient mobile charging for smartphones, phablets, tablets and other 3C accessories. They are multipurpose, small in size, safe, reliable and long in life.




    Mobile Battery Pack: Basics

    Basic components of a portable battery pack comprise of the following: battery, circuit board, USB output, micro USB input, power switch and LED indicator. The battery cell is discharged via the Micro-USB output and USB output.




    Battery Cell Types 
Li-ion (Lithium-ion) : 

    Regular (18650) lithium cells are characterized by uniform size (Diameter: 18mm, Height: 65mm) Single battery holds an average 2200~2600mAh and are mainly manufactured in Japan/Korean/China. Grade A lithium cell batteries holds an average 3000~3400mAh but are mainly manufactured in Japan and Korean for their respective markets only. Li-ion cells have high energy densities and costs less than Li-Polymer due to cheaper and quicker production methods.




    Li-Polymer :

    Battery has high plasticity that resembles a plastic film and therefore can be adapted to match a variety of packaging shapes and sizes. They do not have a uniform size like lithium ion cells. They also have a greater life cycle degradation rate than Li-ion and is around 20% lighter. Due to high costs, majority is produced in Mainland China. Apple’s iPhones and iPads use li-polymer to match their slim designs.




    Power Conversion & Efficiency Calculated

    Mobile power supply capacity is directly related to battery capacity of mobile device. Assume you have a 5000mAh battery pack to charge an iPhone 5 (1440mAh). Using the mathematical sum of 5000/1440 to identify how many times a device can be charged, figures indicate it can be charged 3.47 times, but the actual use is 2.36 times. Why is this? 

The reason for this is because the battery cell voltage is 3.7 - 4.2V, whilst the mobile device is charged at 5V. This results in power transfer loss. 


    Battery capacity conversion calculations:

    ♦ Mobile power capacity x Product conversion efficiency (75~90%) = Actual discharge of capacity

    ♦ Actual discharge capacity x Conversion efficiency (85~90%) = actual charge capacity into apparatus

    ♦ Actual charge capacity / unit build battery capacity = actual charging time


    Screen Shot 2014-07-17 at 3.38.50 PM.png


    Power Bank Charging Times 

    Power bank charging times will vary with the external power supply used. For instance, the majority of desktop and laptops use a USB2.0 (5V/500mAh) or USB3.0 (5V/900mAh) output, whilst a standard wall charger may use a (5V/1A) or (5V/2A) output. In these examples, the (5V/2A) output will charge fastest.

    Action under 5000mAh Power as an example:

    ♦ 5000mAh / 500mAh (USB2.0) / 0.85(Energy conversion efficiency) = 11.76 hours

    ♦ 5000mAh / 900mAh (USB3.0) / 0.85 = 6.53 hours

    ♦ 5000mAh / 1000mAh (AC) / 0.85 = 5.88 hours

    ♦ 5000mAh / 2000mAh (AC) / 0.85 = 2.94 hours

    *Above is based on theoretical calculations as due to battery energy losses


    Things to watch out for :

    1. Large capacity and cheap price - Price reflects quality, therefore battery packs claiming to have a high capacity but much cheaper than a battery pack with lower capacity is something users need to be cautious of.

    2. High capacity and low weight - Battery capacity is proportional to weight.

    3. Small size and high capacity - Volume is proportional to battery capacity.

    4. Warranty period less than 1 year - Possibility of recycled batteries used.

    5. No battery certifications - No third party certification-licensing unit provided therefore users will have no idea how safe the device really is.


    How to properly use your mobile battery pack:


    1. Do not charge and discharge your battery pack at the same time as it may cause abnormal operation that may result in damage.

    2. Do not place in hot areas or fire as it may result in the battery exploding.

    3. Do not use in areas of high humidity as battery it may cause rust or short-circuit the boards

    4. Do not place near children.


    What is MFI Apple Certification?

    Apple MFI Certification (see logo: right) represents a label that is printed on product packaging. 

This certification is given upon passing Apple’s technical approval with a device having a 30 pin, or 8 pin connector and to ensure a device is fully compatible with Apple products. A certain amount of royalty is paid to apple for this certification therefore products under this specification are usually priced higher. This however does not guarantee that manufacturers will not use inferior grade products or false battery capacities in their production. Increasingly worrying is the amount of products that have not been certified yet have the apple MFI certified logo.




    Flight Safety Regulations

    According to flight safety regulations, any charging equipment (spare or installed power should be clearly labeled in (watts) and must not exceed 43,200mAh. To calculate this:


    Screen Shot 2014-07-17 at 3.46.01 PM.png


    WH(Wh) that is the power unit with the formula :

    P(powerWH)=V(voltageV) x I(capacity mAh)/1000 
Using LUXA2’s P-MEGA 41,600mAh Power Station as an example:
(41,600mAh / 1000) x3.7V = 41.6A x 3.7V =153.92Wh .Can be placed in hand luggage
160Wh / 3.7V = 43,200mAh = maximum allowed to be carried on plane


    Other Relevant Information :

    1. Korean batteries (Samsung, LG) with single cell of 2200mAh (Li-ion) costs around $2. Therefore a 18000mAh battery pack core battery possesses around 8 batteries ($16), plus electronics components, housing, labour costs, shipping, vendor costs and channel profits may be sold to consumers at $15-20? This is of course no possible as a more reasonable product pricing range should be around $35-40.


    2. A standard 2200~2600mAh Li-ion battery weighs around 45-46g plus electronic components and case should therefore weigh around 70g. On some Internet sites there are some high capacity battery packs 18000mAh that weigh only around 380-400g. This is not possible.

  3. We are always asked by fans what kind of devices are compatible with wireless charging technology, and to assist we have provided an up to date compatibility chart for you to refer to. This chart will continually be updated as to ensure the latest devices that do support wireless charging are known to you.


    Rx compatibility table 20150721.pdf


    If you have any wireless charging compatibility questions you need answered, feel free to leave a reply and we will get back to you. 

  4. Hi Martin, Thank you for your reply, 



    I live in Holland. Is this product out of stock, because its an old product  or because its new?


    My country does not sell the black  version.

    There is only 1 distributor (From holland) who sell only the silver version and there is only 4 in stock (color silver  price 36 euro)


    The black version

    is availlable in   germany and    co.uk for 50 euro incl shipping to Holland (netherlands)


    50 euro is very expensive for me


    Nwegg does not ship to Holland and it will take many days (7-21)

    Hi Ray, 


    I'll have a word with Martin and see if we can work something out for you ;)

  5. Are you an owner of one of our beloved Groovy audio series products?


    Share it with us and we'll add you to the LUXA2 Groovy Audio Series Owner's Club list where you will have the opportunity to learn about all the newest and most exciting products well before anyone else!


    Simply post a photo of the product, model number and your username.


    Like this:


    Tt Tautlih - GroovyW



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