Comments on: Power Bank for Smartphones https://www.electronicsforu.com/electronics-projects/power-bank-circuit Electronics For U | Circuits, News & Mini Projects Fri, 17 Jan 2025 13:51:56 +0000 hourly 1 https://wordpress.org/?v=6.8.1 By: owolabi okiki https://www.electronicsforu.com/electronics-projects/power-bank-circuit#comment-239450 Sat, 18 Jul 2020 19:55:44 +0000 https://www.electronicsforu.com/?p=19483#comment-239450 Comment:pls I am so interested how to repair powerbank but I have to understand d function of all d components.this is my no./Whatsapp +2348056676386 or +2348060593115 email okikigsm@gmail.com. you can send me links,vidio that can help.tanks

]]> By: Anirvan https://www.electronicsforu.com/electronics-projects/power-bank-circuit#comment-234706 Thu, 21 May 2020 16:20:33 +0000 https://www.electronicsforu.com/?p=19483#comment-234706 Do we need both Pull up and Pull down configuration or anyone ?

]]> By: R.GANESAN https://www.electronicsforu.com/electronics-projects/power-bank-circuit#comment-215727 Sat, 14 Dec 2019 12:02:36 +0000 https://www.electronicsforu.com/?p=19483#comment-215727 The circuit is well connected and the batteries are fully charged.
while i connected the smart phone to the power bank…after about seven or eight seconds, the out put at the USB terminal drops to zero. But the batteries are showing full voltage.
any solution can be suggested please.
The output drops to zero after few seconds whether the load is connected or not connected.

]]> By: R.GANESAN https://www.electronicsforu.com/electronics-projects/power-bank-circuit#comment-215723 Sat, 14 Dec 2019 11:46:21 +0000 https://www.electronicsforu.com/?p=19483#comment-215723 The circuit is well connected and the batteries are fully charged.
while i connected the smart phone to the power bank…after about seven or eight seconds, the out put at the USB terminal drops to zero. But the batteries are showing full voltage.
any solution can be suggested please.

]]> By: Yasar498 https://www.electronicsforu.com/electronics-projects/power-bank-circuit#comment-212884 Mon, 02 Dec 2019 06:30:10 +0000 https://www.electronicsforu.com/?p=19483#comment-212884 Hi. I’ve built the powerbank in accordance with the given circuit. The smartphone that I’ve connected charges, however, it’s very faint; while it prevents the phone battery charge from dropping any further, it can’t manage to increase the charge of the battery. I’ve been testing the circuit for about 30 minutes now, and I’ve checked that the compound battery voltage has dropped to 1.4 V from 3.7 volts( I’m using four 18650 4300mAh batteries in parallel) . What can I do to improve the performance of the circuit?

]]> By: vijay https://www.electronicsforu.com/electronics-projects/power-bank-circuit#comment-189662 Mon, 02 Sep 2019 10:49:00 +0000 https://www.electronicsforu.com/?p=19483#comment-189662 In reply to Baljit Singh.

I am also working on the same issue if any answer plz let me know

]]> By: P.Gopal Rao https://www.electronicsforu.com/electronics-projects/power-bank-circuit#comment-179368 Mon, 15 Jul 2019 06:32:50 +0000 https://www.electronicsforu.com/?p=19483#comment-179368 In reply to Deepjyoti kalita.

I can answer your questions. just email me at:gopalrao111@gmail.com

]]> By: Deepjyoti kalita https://www.electronicsforu.com/electronics-projects/power-bank-circuit#comment-161482 Wed, 01 May 2019 05:06:35 +0000 https://www.electronicsforu.com/?p=19483#comment-161482 How many batteries can be. Connected

]]> By: Himmat shah https://www.electronicsforu.com/electronics-projects/power-bank-circuit#comment-143354 Wed, 20 Feb 2019 04:52:40 +0000 https://www.electronicsforu.com/?p=19483#comment-143354 Please send mobile charger/power bank with all protection with ckt diagram cap. 2Amp for mobile charger o/p to get component easily

]]> By: NILESH PULAMARASETTI https://www.electronicsforu.com/electronics-projects/power-bank-circuit#comment-121302 Mon, 01 Oct 2018 08:01:52 +0000 https://www.electronicsforu.com/?p=19483#comment-121302 Is this circuit compatible with 20,000mah battery?

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