Do you remember how old it is? Batteries deteriorate over time, and sometimes they are only able to charge on higher-output chargers. So you might need to stick with chargers that are rated for Qualcomm QuickCharge, or have a higher amp output.

I have this charger, I definitely recommend it.

I got this Aukey 3 port charger with Quick Charge 2.0

http://smile.amazon.com/gp/product/B00VHHIUNY?psc=1&redirect=true&ref_=od_aui_detailpages00

It works very well and surprisingly compact for a 3-port unit since the prongs fold it. It's perfect for traveling. It's $23 right now, but once in a while, it'll go on sale for $12.50.

Any chargers with Qualcomm Quickcharge 2.0 or newer should work.

Some examples:

[Qualcomm Certified] AUKEY 18W Single Port USB Turbo Wall Charger Fast Charger with Quick Charge 2.0; Includes a 3.3ft Quick Charge Micro USB Cable; for Samsung Galaxy S6, S6 Edge and more - Black https://www.amazon.com/dp/B00QEX83LA/

[Qualcomm Quick Charge 2.0] Anker PowerPort+ 1 (QC & PowerIQ 2-in-1 Premium 18W USB Wall Charger) for Galaxy S6 / Edge / Plus, Note 5 / 4, LG G4, Nexus 6, Samsung Fast Charge Wireless Charger and More https://www.amazon.com/dp/B014F3D8FQ/

An example of multiple port charger, so you can charge your tablet with standard 2.0 amp 5V as well:

AUKEY 42W 3-Port USB Desktop Charging Station Wall Charger with Qualcomm Quick Charge 2.0 & AiPower Adaptive Charging Technology; Includes a 3.3ft Quick Charge Micro USB Cable - Black https://www.amazon.com/dp/B00VHHIUNY/