https://jestineyong.com Semiconductors, Test Equipments, Circuit Board Troubleshooting, Electronic Repair Courses and Many More! Sun, 01 Jun 2025 10:04:05 +0000 en-US hourly 1 https://wordpress.org/?v=5.4.19 https://jestineyong.com/repair-of-power-bank-charging-circuit/ https://jestineyong.com/repair-of-power-bank-charging-circuit/#comments Sun, 01 Jun 2025 10:04:04 +0000 https://jestineyong.com/?p=35324               This scrab of power bank circuit have been laying around with me for quite a while and I thought making use of it. Infact I thought of using it to charge a 7.4V Li-ion battery pack, which i made, but I guess I was out of mind when […]

The post Repair Of Power Bank Charging Circuit first appeared on Electronics Repair And Technology News.]]> https://jestineyong.com/repair-of-power-bank-charging-circuit/feed/ 9 https://jestineyong.com/charging-problem-solved-in-nameless-power-bank/ https://jestineyong.com/charging-problem-solved-in-nameless-power-bank/#comments Sat, 26 Apr 2025 08:33:02 +0000 https://jestineyong.com/?p=35112         This nameless, brand less power bank was brought to me by a new customer from our residential association stating that the charging port was damaged. I pried open the sides releasing the sticky tape with a plastic blade to avoid any accidental shorting. What you see in the picture above is […]

The post Charging Problem Solved In Nameless Power Bank first appeared on Electronics Repair And Technology News.]]> https://jestineyong.com/charging-problem-solved-in-nameless-power-bank/feed/ 11 https://jestineyong.com/fake-batteries-found-in-xiaomi-power-bank-t10-4/ https://jestineyong.com/fake-batteries-found-in-xiaomi-power-bank-t10-4/#comments Mon, 08 Oct 2018 10:21:55 +0000 https://jestineyong.com/?p=17912                 This power bank was bought by my son for a cheap price, knowingly well that it could be a fake, and brought it to me for opening and checking it up. Just see what was inside:   Just one cell along with three heavy plastic battery look […]

The post Fake Batteries Found In Xiaomi Power Bank T10.4 first appeared on Electronics Repair And Technology News.]]> https://jestineyong.com/fake-batteries-found-in-xiaomi-power-bank-t10-4/feed/ 15 https://jestineyong.com/servicing-romai-power-bank-10400mah/ https://jestineyong.com/servicing-romai-power-bank-10400mah/#comments Mon, 12 Feb 2018 09:47:05 +0000 https://jestineyong.com/?p=16526                   My mobile Power Bank, another Chinese make, which is only about 2 years old, started giving troubles.  It does not take load sometimes and charging LED goes off on its own even though mobile is not fully charged.  So, I opened this power bank for the […]

The post Servicing Romai Power Bank 10400mAh first appeared on Electronics Repair And Technology News.]]> https://jestineyong.com/servicing-romai-power-bank-10400mah/feed/ 9 https://jestineyong.com/20000mah-battery-power-bank-problem-solved/ https://jestineyong.com/20000mah-battery-power-bank-problem-solved/#comments Mon, 13 Jul 2015 03:57:51 +0000 https://www.jestineyong.com/?p=10023               I bought a 20,000mah battery power bank from my relative for my family members to use it. I thought we will use this power bank but the fact is we rarely use it. In fact I was totally forgotten about this power bank. When I found this power […]

The post 20,000mah Battery Power Bank Problem Solved first appeared on Electronics Repair And Technology News.]]> https://jestineyong.com/20000mah-battery-power-bank-problem-solved/feed/ 66 https://jestineyong.com/power-bank-repaired/ https://jestineyong.com/power-bank-repaired/#comments Thu, 11 Jun 2015 03:45:50 +0000 https://www.jestineyong.com/?p=9772             I got this iFans power bank as a gift a few months ago, it’s quite handy to have when you are on the go for charging your cell phone or ipod and so on. It has 2 USB ports so you can charge 2 devices at the same time. […]

The post Power Bank Repaired first appeared on Electronics Repair And Technology News.]]> https://jestineyong.com/power-bank-repaired/feed/ 25