Battery charging module for li-ion batteries.

Where to buy  20 for $6.26 (I paid $8.18 in November) http://www.aliexpress.com/item/20PCS-TP4056-1A-Lipo-Battery-Charging-Board-charging-module-Charger-Module-lithium-battery-DIY-Mini-USB/1826271334.html
 You can buy 20 of the chips http://www.ebay.com/itm/20Pcs-TP4056-SOP-8-TP-Chips-Battery-Charging-IC-/181406595667?pt=LH_DefaultDomain_0&hash=item2a3cacfa53 for $3.58 and then solder the connections yourself, I’m not sure it’s worth the time though.
Or 100pc for $17.80 0.18each http://www.aliexpress.com/item/Free-shipping-TP4056-SOP8/2025963780.html?s=p
Important to Note
– Color: Blue
– Material: PCB + iron
– Chipset: TP4056
– Input voltage: 4.5V~5.5V
– Fully charged voltage: 4.2V
– Charging current: 1A adjustable
– Working temperature: -10’C~85’C
– Charging method: Linear charging 1%
– Charging precision: 1.5%
– Charging indicator: Red light charging, green light fully charged
– Interface: Mini USB
 tp4056
Useful Info & Review http://lygte-info.dk/review/Review%20Charger%20TP4056%20UK.html
 Modification on that board from DX http://www.dx.com/p/tp4056-1a-li-ion-battery-charging-module-blue-4v-8v-215797#.VJ8RbshzA
 Datasheet on TP4056 http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/TP4056.pdf