Samsung 15W USB-C Wall Charger

I used this Samsung charger (45W) and another Samsung charger (15W) to charge my new Samsung Galaxy A36. With this 45W charger, it took ca. 39 minutes to charge my A36 from ca. 30% to 100%. With the other 15W charger, it took ca. 67 minutes to charge my A36 from ca. 29% to 100%. 45W/15W = 3 times the NOMINAL charging rate 67minutes/39minutes ==> 1.72 times the ACTUAL charging rate (i.e., this 45W charger took 58% of the time needed by the 15W charger). BUT 67minutes - 39minutes ==> 28 minutes saved. That time saving is not significant for me, especially when one considers all the adverse effects of charging a lithium battery at 45W vs 15W. For example, Charging____Heat________Battery Rate_______Release______Lifespan 45W________High________10–15% SHORTER lifespan 25W_______Medium______Baseline 15W________Low_________5–10% LONGER lifespan Approximate Charging Times for A36 (from starting %charge to final %charge shown) Charger__15%–85%______20%–85%______25%–95% 45W ____~30–35 min____~28–33 min_____~40–45 min 25W ____~45–50 min____~42–48 min_____~55–65 min 15W ____~70–75 min____~65–72 min_____~85–95 min Bottom-line REASONS why using a 15W charger to charge ANY BATTERY from 20%–85% is OPTIMAL: -- Avoids high-voltage wear (85–100%) -- Avoids low-voltage stress (<15–20%) -- Provides solid daily use (6.5–7 hrs) -- Maximizes BATTERY lifespan without requiring micromanagement -- Well-matched with adaptive charging features -- Minimal risk of lithium plating even at 25W or 45W -- SEE SUMMARY TABLE BELOW Consequently, I will use my 45W charger ONLY whenever I’m desperate for a RAPID full charge (almost never). -- The time savings is minimal. -- The BATTERY LIFESPAN DAMAGE is serious, especially when the new Samsung Galaxy models have 6-year updates for OS and security, especially since, if the battery dies in 3 years because of DEEP (0%-100%) fast-charging, one will most probably have to buy a new device (especially since the battery is NOT user-replaceable). =============== SUMMARY TABLE: =============== Battery_____Battery________Battery_________Lithium______________________Daily Charging___Charging_______Lifespan________Plating__________Battery______Usage Range______Cycles_________(Years)__________Risk____________Stress_______Time (hours) 15–85%____1,200–1,500____~4–5 years______Very Low________Minimal______~7 20–85%____1,300–1,600____~4.5–5+ years____Very Low________Minimal______~6.5 20–90%____800–1,000______~3–3.5 years_____Low–Moderate___Mild_________~7 25–95%____500–700_______~2.5–3 years_____Moderate–High___Significant____~7 =============== OPTIMAL LIFESPAN Short-cycling options (from starting %charge to final %charge shown): Range ___Battery Stress___Expected Lifespan Impact 30%-85%___Low____________Excellent longevity 40%-85%___Very low________Excellent longevity 50%-85%___Ultra-low________Maximal longevity 60%-85%___Negligible_______Maximal longevity, but lower daily runtime