Which batteries give the most juice for the money?

Power Tool Batteries

| make/model | tech | V | amphours | watt hours | warranty | net cost | price/Ah | price/Wh | |—|—|—|—|—|—|—|—|—|—| | DSANKE (Black&Decker) | Li-Ion | 18v | 5 Ah ||| $29 | $5.8 | $0.32 | | generic (Ryobi) | Li-Ion | 18v | 6 Ah ||| $33 | $5.5 | $0.31 | | Powerextra (Porter Cable) | Li-Ion | 20v | 5 Ah ea. || 1yr | $63/2 | $6.3 |$0.35| | TenHutt (Ryobi) | Li-Ion | 18v | 9 Ah ||| $64 | $7.11 |$0.40| | Swidan (Greenworks) | Li-Ion | 40v | 5 Ah ||| $66 | $13.2 |$0.37| | Waitley (DeWalt) || 20v | 9 Ah ||| $70 | $7.78 |$0.43| | Lotive (Greenworks) | Li-Ion | 40v | 6 Ah || 30 days | $69 | $11.5 | $0.32 | | Epowon (Greenworks) | Li-Ion | 40v | 5 Ah || 1yr | $73 | $14.6 | $0.41 | | Waitley (DeWalt) || 20v | 6 Ah ea. ||| $76/2 | $6.33 |$0.35| | Ryobi | Li-Ion | 18v || 28 Wh ea.| 90day | $78/2 | ? |$1.39 | | Waspt | Li-Ion | 40v | 6 Ah ||| $82 | $13.67 |$0.38| | Elefly | Li-Ion | 40v | 6 Ah || 1yr | $88 | $14.67 |$0.41| | Porter Cable | Ni-Mh | 20v | 4 Ah ea.||| $110/4 | $6.88 |$0.38| | Powerworks | Li-Ion | 60v | 5 Ah | 270 Wh || $140 | $28 |$0.52| | Greenworks | Li-Ion | 40v | 5 Ah || 2yr | $180 | $36 |$1 | | Greenworks | Li-Ion | 60v | 5 Ah || 2yr | $200 | $40 |$0.77| | eGo BA4200 | Li-Ion | 56V | 7.5Ah || 3yr | $233 | $31.07 |$0.60|

Batteries specialized for E-bikes

| make/model/shape | tech | V | amphours | watt hours | warranty | net cost | price/Ah | price/Wh | |—|—|—|—|—|—|—|—|—|—| | greencycle bottle || 24v 250w | 10 Ah || 23 days | $95 | $9.5 | $0.40 | | HaiTu Bottle | Li-Ion | 36v | 7 Ah ||| $130 | $18.57 | $0.52 | | fastakeep | Li-Ion | 24v | 8 Ah || 30 days | $150 | $18.75 | $0.78 | | dolphin | Li-ion | 36v | 11 Ah || 1 yr | $153 | $13.91 | $0.39 | | green E-motion bottle || 36v | 8 Ah || 23 days | $154 | $19.13 | $0.53 | | Hailong Downtube | Li-Ion | 48v | 12.5 Ah || 1yr | $195 (EU only; paypal only!) | $15.6 | $0.33 | | Sanyo | Li-Ion | 52v | 8 Ah || 1yr | $209 | $26.13 | $0.50 | | generic | Li-Ion | 48v | 10 Ah || 1yr | $214 | $21.36 | $0.46 | | Downtube | Li-Ion | 52v | 10.4 Ah | | 30 days | $226 | $21.73 | $0.42 | | ebike motor battery store || 36v | 10 Ah ||| $227 | $20.6 | $0.57 | | green E-motion bottle || 52v | 10 Ah || 23 days | $227 | $22.7 | $0.44 | | Hailong dolphin shark | Li-Ion | 48v | 10 Ah || 1yr | $227 | $22.7 | $0.47 | | fastakeep | Li-Ion | 52v | 10 Ah || 30 days | $236 | $23.6 | $0.45 | | Dsaikl | Li-Ion | 52v 750w | 10 Ah ||| $239 | $23.9 | $0.46 | | Wallen Power Hailong | Li-Ion | 48v | 10 Ah || 1yr | $243 | $24.3 | $0.51 | | 01-Case | Li-ion | 48v | 10 Ah ||| $243 | $24.3 | $0.51 | | Risklight | Li-Ion | 52v | 10 Ah | | >1yr “Guarantee”? | $244 | $24.4 | $0.47 | | green E-motion bottle || 52v | 12 Ah || 23 days | $246 | $20.5 | $0.40 | | Luna Wolf Pup (Samsung 21700 40T cells) | Li-Ion | 52v | 4 Ah | 200 Wh || $249 | $0.75 | $1.25 | | jsa kaka | Li-Ion | 52v | 10.2 Ah || 1yr | $250 | $24.51 | $0.47 | | jsa kaka | Li-Ion | 52v 500w? | 10 Ah || 1yr | $255 (s/h) | $25.5 | $0.49 | | ebird locking battery || 48v | 10 Ah ||| $255 | $25.5 | $0.53 | | Hailong | Li-Ion | 52v | 13 Ah || 23 days | $260 | $20 | $0.38 | | 03-Case | Li-ion | 48v | 10 Ah ||| $262 | $26.2 | $0.55 | | unit pack power Hailong2 | Li-Ion | 48v | 13 Ah | 624 Wh | 1yr | $263 | $20.23 | $0.42 | | eco-bike bottle || 36v | 7 Ah | 252 Wh 15a || $275 | $39.29 | $1.09 | | Chamrider || 52v | 13 Ah || 1yr | $279 | $21.46 | $0.41 | | dolphin | Li-Ion | 52v | 10.4 Ah || 1yr | $281 | $27.02 | $0.52 | | Hailong 3 | Li-Ion | 52v | 13 Ah || 1yr | $281 | $21.62 | $0.42 | | Best Bikes || 52v | 13 Ah | 676 Wh | 1yr | $284 | $21.85 | $0.42 | | bottle | Li-ion | 48v 750w | 13 Ah || 1yr | $326 | $25.08 | $0.52 | | down tube | non-lead | 52v | 13 Ah || 1yr | $336 | $25.85 | $0.50 | | Whale | Li-Ion | 52v | 11.6 Ah || 1yr | $349 | $30.09 | $0.58 | | Samsung | | 52v | 14 Ah || 1yr | $354 | $25.29 | $0.49 | | ebird bottle || 48v | 10 Ah ||| $358 | $35.8 | $0.75 | | Jumbo Hailong Shark || 52v | 13 Ah | 676 Wh 30a || $400 | $30.77 | $0.59 | | Jumbo Shark || 48v | 14.3 Ah ||| $544 | $38.04 | $0.79 |

Assumptions in the “price/Wh” calculations:

  • 20v batteries are really 18v
  • 40v batteries are really 36v
  • 52-60v batteries are really 52v

because marketers lie. Amphours may be lies too, likely rounded to whole numbers, but we can’t do anything about that.