The Asus Zenfone 8 Flip appeared on the market in May 2021 and fits into our Premium ($600-$799) segment. It comes with a triple-camera setup, including a 64 MP main camera that flips open (hence the name). Here are some of its key test results in our Battery protocol.
Key specifications:
- Battery capacity: 5000 mAh
- 30W charger
- 6.67-inch, 1080 x 2400, 90 Hz OLED display
- Qualcomm Snapdragon 888 5G (5 nm) chipset
- Tested ROM / RAM combination: 256 GB + 8 GB
About DXOMARK Battery tests: For scoring and analysis in our smartphone battery reviews, DXOMARK engineers perform a variety of objective tests over a week-long period both indoors and outdoors. This article highlights the most important results of our testing. (See our introductory and how we test articles for more details about our smartphone Battery protocol.)
Test summary
Scoring
Sub-scores and attributes included in the calculations of the global score.
Asus Zenfone 8 Flip
102
battery
96
Honor X7b
Best: Honor X7b (221)
91
Samsung Galaxy M51
Best: Samsung Galaxy M51 (195)
116
Samsung Galaxy M51
Best: Samsung Galaxy M51 (198)
96
Realme GT Neo 5 (240W)
Best: Realme GT Neo 5 (240W) (224)
104
Realme GT Neo 5 (240W)
Best: Realme GT Neo 5 (240W) (212)
133
Nubia RedMagic 7 Pro
Best: Nubia RedMagic 7 Pro (205)
93
Apple iPhone 14 Pro
Best: Apple iPhone 14 Pro (194)
Key performances
These key points are derived from the lab measurements during testing and do not figure into the overall score. The lab measurements, however, are used for the overall score.
2h41 autonomy
after 5-minute charge
Please be aware that beyond this point, we have not modified the initial test results. While data and products remain fully comparable, you might encounter mentions and references to the previous scores.
Position in Global Ranking
148
th
4. Honor Magic6 Lite (5800 mAh)
156
9. Honor Magic6 Lite (5300 mAh)
150
10. Realme GT Neo 5 (240W)
147
19. Samsung Galaxy S23 Ultra
142
29. Samsung Galaxy A15 LTE
137
30. Apple iPhone 13 Pro Max
136
30. Xiaomi Redmi Note 12 Pro 5G
136
40. Apple iPhone 15 Pro Max
134
40. Xiaomi Redmi Note 11 Pro 5G
134
44. Apple iPhone 14 Pro Max
133
44. Vivo X60 Pro 5G (Snapdragon)
133
44. Xiaomi Redmi Note 11S 5G
133
51. Xiaomi Redmi Note 12 5G
132
51. Xiaomi Redmi Note 10S
132
59. Oppo Reno6 Pro 5G (Snapdragon)
130
59. Samsung Galaxy S24 Ultra
130
61. Samsung Galaxy A34 5G
129
61. Samsung Galaxy A23 5G
129
61. Xiaomi Redmi Note 12 Pro+ 5G
129
61. Xiaomi Redmi Note 10 Pro
129
69. Samsung Galaxy A15 5G
127
78. Samsung Galaxy A13 5G
125
86. Apple iPhone 12 Pro Max
121
86. Samsung Galaxy A55 5G
121
89. Xiaomi Redmi Note 13 Pro 5G
120
89. Xiaomi Redmi Note 10 5G
120
101. Samsung Galaxy A14 5G
117
101. Xiaomi Redmi Note 13
117
108. Crosscall Stellar-X5
115
112. Samsung Galaxy Z Fold5
114
112. Xiaomi Mi 10T Pro 5G
114
117. Samsung Galaxy A54 5G
113
121. Motorola Moto G62 5G
112
125. Motorola Moto G9 Power
111
125. Samsung Galaxy S21 Ultra 5G (Snapdragon)
111
125. Xiaomi Redmi Note 13 Pro Plus 5G
111
131. Samsung Galaxy Z Flip5
109
131. Samsung Galaxy S24+ (Exynos)
109
135. Samsung Galaxy S21 5G (Snapdragon)
108
139. Samsung Galaxy S24 (Exynos)
107
139. Xiaomi Mi 11 Lite 5G
107
141. Samsung Galaxy A52 5G
106
145. Samsung Galaxy S22 Ultra (Snapdragon)
103
148. Motorola moto g34 5G
102
152. Samsung Galaxy S23 FE
101
152. Samsung Galaxy A35 5G
101
154. Samsung Galaxy S21 5G (Exynos)
100
154. Xiaomi Redmi 10 2022
100
159. Apple iPhone 13 mini
99
159. Samsung Galaxy Z Fold4
99
159. Vivo X80 Pro (Snapdragon)
99
164. Motorola Edge 30 Pro
98
164. Samsung Galaxy S22 Ultra (Exynos)
98
168. Samsung Galaxy A33 5G
96
171. Samsung Galaxy Z Flip4
95
171. Samsung Galaxy S22+ (Exynos)
95
171. Samsung Galaxy A53 5G
95
176. Xiaomi Redmi Note 13 5G
94
178. Apple iPhone 12 mini
93
178. Samsung Galaxy S21 Ultra 5G (Exynos)
93
181. Samsung Galaxy Z Fold3 5G
92
182. Motorola moto g54 5G
90
182. Samsung Galaxy S22 (Snapdragon)
90
188. Apple iPhone SE (2022)
84
190. Samsung Galaxy S21 FE 5G (Snapdragon)
82
194. Samsung Galaxy S22 (Exynos)
75
Position in Premium Ranking
27
th
2. Vivo X60 Pro 5G (Snapdragon)
133
4. Oppo Reno6 Pro 5G (Snapdragon)
130
23. Samsung Galaxy S21 5G (Snapdragon)
108
24. Samsung Galaxy S24 (Exynos)
107
29. Samsung Galaxy S21 5G (Exynos)
100
36. Samsung Galaxy S22 (Snapdragon)
90
38. Samsung Galaxy S21 FE 5G (Snapdragon)
82
40. Samsung Galaxy S22 (Exynos)
75
Pros
- More than 2 days of autonomy with moderate use
- Good autonomy for calibrated 3G calling and gaming
Cons
- Poor charging experience compared to other devices in its segment
- High power consumption when streaming video
- No wireless charging
The Asus Zenfone 8 Flip has the largest battery capacity (5000 mAh) in this comparison. Coming with a 30W charger, it has the same global score as the Samsung Galaxy S21 5G (Exynos); but both the Asus and Samsung devices come in behind the OnePlus 9, thanks to its outstanding charging experience and better efficiency.
The table below shows the battery capacity, tested charger, display type and resolution, and processor specifications for all three of these Premium devices.
|
Asus Zenfone 8 Flip |
Samsung Galaxy S21 5G (Exynos) |
OnePlus 9 |
| Battery capacity |
5000 mAh |
4000 mAh |
4500 mAh |
| Charger
Wireless |
30W
No
|
25W (not included)
15W |
65W
15W
|
| Display type |
AMOLED |
AMOLED |
AMOLED |
| Display resolution |
1080 x 2400 |
1080 x 2400 |
1080 x 2400 |
| Chipset |
Qualcomm Snapdragon 888 5G 5 nm |
Exynos 2100 5 nm |
Qualcomm Snapdragon 888 5G 5 nm |
Autonomy (55)
How long a battery charge lasts depends not only on battery capacity but also on other aspects of the phone’s hardware and software. The DXOMARK Battery autonomy score is composed of three performance sub-scores: (1) Stationary, (2) On the go, and (3) Calibrated use cases. Each sub-score comprises the results of a comprehensive range of tests for measuring autonomy in all kinds of real-life scenarios.
72h
Light Usage
Active: 2h30/day
49h
Moderate Usage
Active: 4h/day
30h
Intense Usage
Active: 7h/day
The Asus Zenfone 8 Flip comes out ahead of the Samsung Galaxy S21 5G (Exynos) but remains behind the OnePlus 9 in our Autonomy tests.
Position in Global Ranking
Battery Life (moderate)
142
nd
8. Samsung Galaxy A15 LTE
78h
9. Honor Magic6 Lite (5800 mAh)
77h
11. Honor Magic6 Lite (5300 mAh)
77h
17. Xiaomi Redmi Note 11S 5G
72h
24. Xiaomi Redmi Note 10 5G
70h
28. Apple iPhone 15 Pro Max
69h
29. Samsung Galaxy A15 5G
69h
31. Samsung Galaxy A13 5G
69h
33. Apple iPhone 13 Pro Max
68h
35. Xiaomi Redmi Note 10 Pro
67h
36. Samsung Galaxy S23 Ultra
67h
37. Xiaomi Redmi Note 12 5G
67h
43. Samsung Galaxy A34 5G
65h
45. Apple iPhone 14 Pro Max
65h
48. Samsung Galaxy A23 5G
64h
54. Motorola Moto G9 Power
64h
57. Xiaomi Redmi Note 12 Pro 5G
62h
58. Samsung Galaxy A14 5G
62h
59. Xiaomi Redmi Note 11 Pro 5G
62h
60. Xiaomi Redmi Note 10S
61h
63. Samsung Galaxy A54 5G
60h
82. Samsung Galaxy A55 5G
57h
89. Samsung Galaxy S24 Ultra
56h
91. Samsung Galaxy A52 5G
56h
92. Xiaomi Redmi Note 13 Pro 5G
56h
94. Xiaomi Redmi Note 12 Pro+ 5G
55h
95. Realme GT Neo 5 (240W)
55h
104. Xiaomi Mi 11 Lite 5G
54h
105. Samsung Galaxy Z Fold5
54h
109. Motorola moto g54 5G
53h
111. Nubia RedMagic 7 Pro
53h
117. Motorola Edge 20 Pro
52h
127. Xiaomi Mi 10T Pro 5G
51h
131. Vivo X60 Pro 5G (Snapdragon)
51h
132. Xiaomi Redmi Note 13 5G
50h
138. Samsung Galaxy S21 5G (Snapdragon)
50h
140. Samsung Galaxy A35 5G
49h
141. Samsung Galaxy A53 5G
49h
146. Samsung Galaxy S24+ (Exynos)
49h
148. Xiaomi Redmi Note 13 Pro Plus 5G
49h
149. Samsung Galaxy S24 (Exynos)
49h
150. Apple iPhone 12 Pro Max
49h
151. Samsung Galaxy Z Fold4
49h
153. Samsung Galaxy S21 Ultra 5G (Snapdragon)
48h
155. Oppo Reno6 Pro 5G (Snapdragon)
48h
158. Motorola Edge 30 Pro
47h
159. Samsung Galaxy A33 5G
47h
160. Samsung Galaxy S22 Ultra (Snapdragon)
47h
161. Samsung Galaxy S23 FE
47h
163. Samsung Galaxy Z Flip5
46h
164. Samsung Galaxy S21 5G (Exynos)
46h
166. Nubia RedMagic 6 Pro
46h
171. Samsung Galaxy S22 Ultra (Exynos)
44h
174. Vivo X80 Pro (Snapdragon)
43h
176. Samsung Galaxy Z Fold3 5G
43h
177. Samsung Galaxy Z Flip4
42h
179. Samsung Galaxy S21 Ultra 5G (Exynos)
41h
181. Apple iPhone 13 mini
41h
182. Apple iPhone 12 mini
40h
184. Samsung Galaxy S22+ (Exynos)
40h
185. Samsung Galaxy S22 (Snapdragon)
39h
188. Samsung Galaxy S21 FE 5G (Snapdragon)
38h
191. Apple iPhone SE (2022)
37h
193. Samsung Galaxy S22 (Exynos)
35h
Position in Premium Ranking
Battery Life (moderate)
21
st
18. Vivo X60 Pro 5G (Snapdragon)
51h
20. Samsung Galaxy S21 5G (Snapdragon)
50h
23. Samsung Galaxy S24 (Exynos)
49h
25. Oppo Reno6 Pro 5G (Snapdragon)
48h
27. Samsung Galaxy S21 5G (Exynos)
46h
35. Samsung Galaxy S22 (Snapdragon)
39h
37. Samsung Galaxy S21 FE 5G (Snapdragon)
38h
40. Samsung Galaxy S22 (Exynos)
35h
Stationary
Vivo Y72 5G
Best: Vivo Y72 5G (104)
A robot housed in a Faraday cage performs a set of touch-based user actions during what we call our “typical usage scenario” (TUS) — making calls, video streaming, etc. — 4 hours of active use over the course of a 16-hour period, plus 8 hours of “sleep.” The robot repeats this set of actions every day until the device runs out of power.
The Asus Zenfone 8 Flip lasted 56 hours 34 minutes in our TUS — five hours longer than the Samsung, but 49 minutes less than the OnePlus. The Asus device lost 2% of its battery charge during the night, which is better than its competitors.
Typical Usage Scenario discharge curves
On the go
Samsung Galaxy M51
Best: Samsung Galaxy M51 (96)
Using a smartphone on the go takes a toll on autonomy because of extra “hidden” demands, such as the continuous signaling associated with cellphone network selection, for example. DXOMARK Battery experts take the phone outside and perform a precisely defined set of activities while following the same three-hour travel itinerary for each device.
Although it put in an average performance for social apps, the Asus device did not do well when using its camera and GPS navigation and when calling on the go.
Autonomy for on the go use cases (full charge)
Calibrated
Samsung Galaxy M51
Best: Samsung Galaxy M51 (100)
For this series of tests, the smartphone returns to the Faraday cage and our robots repeatedly perform actions linked to one specific use case (such as gaming, video streaming, etc.) at a time. Starting from an 80% charge, all devices are tested until they have expended at least 5% of their battery power.
The Zenfone 8 Flip did well for 3G call, gaming, and idle management in our calibrated tests, considerably better than its rivals. Both the Asus and the OnePlus did better than the Samsung Galaxy S21 5G (Exynos), which brought up the rear in nearly all calibrated tests.
Autonomy for calibrated use cases (full charge)
Charging (68)
The DXOMARK Battery charging score is composed of two sub-scores, Full charge and Quick boost. Full charge tests assess the reliability of the battery power gauge; measure how long it takes to charge a battery from zero to 80% capacity and from 80 to 100%; and measure how long and how much power the battery takes to go from an indicated 100% to an actual full charge. With the phone at different charge levels (20%, 40%, 60%, 80%), Quick boost tests measure the amount of charge the battery receives after being plugged in for 5 minutes.
Full charge
Black Shark 5 Pro
Best: Black Shark 5 Pro (121)
Power consumption and battery level during full charge
The Asus Zenfone 8 Flip needs 2 hours 19 minutes to go from completely empty to completely full. This is much slower than the OnePlus 9, whose 65W charger fills its 4500 mAh battery in only 39 minutes.
Two points worth noting is that (1) unlike its competitors, the Asus does not support wireless charging; and (2) its 30W charger actually charges at 25W.
Position in Global Ranking
Charging Time 0-80%
151
st
1. Realme GT Neo 5 (240W)
0h08
23. Oppo Reno6 Pro 5G (Snapdragon)
0h22
30. Xiaomi Redmi Note 12 Pro+ 5G
0h24
31. Vivo X80 Pro (Snapdragon)
0h24
36. Xiaomi Redmi Note 13 Pro Plus 5G
0h26
57. Xiaomi Redmi Note 13 Pro 5G
0h31
62. Xiaomi Redmi Note 12 Pro 5G
0h33
70. Samsung Galaxy S23 Ultra
0h37
71. Samsung Galaxy S22+ (Exynos)
0h37
75. Samsung Galaxy S24 Ultra
0h38
76. Xiaomi Redmi Note 11 Pro 5G
0h38
79. Samsung Galaxy S22 Ultra (Snapdragon)
0h39
80. Samsung Galaxy S22 Ultra (Exynos)
0h40
81. Vivo X60 Pro 5G (Snapdragon)
0h40
86. Samsung Galaxy S24+ (Exynos)
0h42
91. Xiaomi Redmi Note 12 5G
0h44
96. Samsung Galaxy S21 Ultra 5G (Snapdragon)
0h46
97. Honor Magic6 Lite (5300 mAh)
0h47
100. Samsung Galaxy Z Flip5
0h48
102. Samsung Galaxy S21 5G (Exynos)
0h48
103. Samsung Galaxy S24 (Exynos)
0h49
104. Samsung Galaxy S21 5G (Snapdragon)
0h49
106. Xiaomi Redmi Note 11
0h49
107. Samsung Galaxy S23 FE
0h49
109. Samsung Galaxy A23 5G
0h49
112. Samsung Galaxy S22 (Snapdragon)
0h50
114. Samsung Galaxy Z Fold5
0h51
115. Samsung Galaxy S22 (Exynos)
0h51
116. Samsung Galaxy A35 5G
0h51
118. Apple iPhone SE (2022)
0h51
118. Samsung Galaxy A34 5G
0h51
120. Samsung Galaxy S21 Ultra 5G (Exynos)
0h51
121. Xiaomi Redmi Note 10
0h52
122. Apple iPhone 12 mini
0h52
123. Xiaomi Redmi Note 10S
0h52
125. Samsung Galaxy A55 5G
0h52
126. Samsung Galaxy A54 5G
0h52
128. Xiaomi Redmi Note 13 5G
0h53
129. Samsung Galaxy S21 FE 5G (Snapdragon)
0h53
132. Samsung Galaxy A33 5G
0h54
132. Xiaomi Redmi Note 11S 5G
0h54
134. Samsung Galaxy A15 LTE
0h54
135. Samsung Galaxy A15 5G
0h54
136. Apple iPhone 15 Plus
0h54
137. Xiaomi Redmi Note 10 Pro
0h55
138. Apple iPhone 15 Pro Max
0h56
139. Samsung Galaxy Z Fold4
0h56
140. Honor Magic6 Lite (5800 mAh)
0h56
142. Samsung Galaxy A53 5G
0h57
143. Samsung Galaxy Z Flip4
0h57
144. Apple iPhone 13 mini
0h57
145. Apple iPhone 12 Pro Max
0h57
146. Samsung Galaxy Z Fold3 5G
0h57
152. Apple iPhone 13 Pro Max
1h01
156. Apple iPhone 14 Plus
1h03
162. Apple iPhone 14 Pro Max
1h06
168. Motorola moto g34 5G
1h12
170. Samsung Galaxy A52 5G
1h15
172. Crosscall Stellar-X5
1h20
176. Xiaomi Redmi Note 10 5G
1h22
178. Xiaomi Redmi 10 2022
1h25
181. Motorola moto g54 5G
1h26
182. Motorola Moto G62 5G
1h26
183. Samsung Galaxy A14 5G
1h28
184. Samsung Galaxy A13 5G
1h30
191. Motorola Moto G9 Power
1h53
Position in Premium Ranking
Charging Time 0-80%
37
th
10. Oppo Reno6 Pro 5G (Snapdragon)
0h22
21. Vivo X60 Pro 5G (Snapdragon)
0h40
26. Samsung Galaxy S21 5G (Exynos)
0h48
27. Samsung Galaxy S21 5G (Snapdragon)
0h49
28. Samsung Galaxy S24 (Exynos)
0h49
29. Samsung Galaxy S22 (Snapdragon)
0h50
31. Samsung Galaxy S22 (Exynos)
0h51
33. Samsung Galaxy S21 FE 5G (Snapdragon)
0h53
Quick boost
Realme GT Neo 3
Best: Realme GT Neo 3 (111)
By plugging in the Zenfone 8 Flip for 5 minutes with less than 50% of battery charge remaining, users will gain more than 2.5 hours autonomy. These results are almost the same as the Samsung phone, but far behind the OnePlus 9’s gain of 6 hours.
| |
| Asus Zenfone 8 Flip | Samsung Galaxy S21 5G (Exynos) | OnePlus 9 |
| Autonomy boost (hh:mm) | 20% | 2:51 | 2:33 | 8:26 |
| 40% | 2:39 | 2:36 | 5:59 |
| 60% | 2:21 | 2:05 | 5:28 |
| 80% | 1:18 | 2:01 | 4:02 |
| Percentage boost | 20% | 8.2 % | 7.4 % | 23 % |
| 40% | 7.6 % | 7.6 % | 16.3 % |
| 60% | 6.7 % | 6.1 % | 14.9 % |
| 80% | 3.7 % | 5.9 % | 11 % |
| Energy consumed | 20% | 1998 mWh | 1458 mWh | 4923 mWh |
| 40% | 1857 mWh | 1487 mWh | 3491 mWh |
| 60% | 1645 mWh | 1192 mWh | 3188 mWh |
| 80% | 911 mWh | 1148 mWh | 2354 mWh |
Efficiency (68)
The DXOMARK power efficiency score consists of two sub-scores, Charge up and Discharge rate, both of which combine data obtained during robot-based typical usage scenario testing, outdoor mobility testing, charging evaluation, and power measurements, and then take into consideration the device’s battery capacity.
The Asus Zenfone 8 Flip showed good performance in some specific tests, but lagged behind its rivals overall.
Charge up
Nubia RedMagic 7 Pro
Best: Nubia RedMagic 7 Pro (105)
The Asus Zenfone 8 Flip has a fairly efficient charging system and charger, but less efficient than its rivals in both cases, as it has higher residual power drain when unplugged than the Samsung and OnePlus.
Discharge
Apple iPhone 13 Pro
Best: Apple iPhone 13 Pro (121)
The Asus device had very high consumption for video streaming, but considerably lower discharge for gaming, 3G call, and idle management than the competition.
Conclusion
The Asus Zenfone 8 Flip does not offer a very good charging experience, but provides more than 2 days of autonomy with moderate use.
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